manuals: add missing SPDX license header to source files

(From yocto-docs rev: 86737cc4583f1ef43bda10033c801329ba0c8b81)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/boilerplate.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 .. include:: <xhtml1-lat1.txt>
 .. include:: <xhtml1-symbol.txt>
 

documentation/genindex.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 =====
 Index
 =====

documentation/migration-guides/migration-1.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 1.4 (dylan)
 ===================
 

documentation/migration-guides/migration-1.5.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 1.5 (dora)
 ==================
 

documentation/migration-guides/migration-1.6.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 1.6 (daisy)
 ===================
 

documentation/migration-guides/migration-1.7.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 1.7 (dizzy)
 ===================
 

documentation/migration-guides/migration-1.8.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 1.8 (fido)
 ==================
 

documentation/migration-guides/migration-2.0.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.0 (jethro)
 ====================
 

documentation/migration-guides/migration-2.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.1 (krogoth)
 =====================
 

documentation/migration-guides/migration-2.2.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.2 (morty)
 ===================
 

documentation/migration-guides/migration-2.3.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.3 (pyro)
 ==================
 

documentation/migration-guides/migration-2.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.4 (rocko)
 ===================
 

documentation/migration-guides/migration-2.5.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.5 (sumo)
 ==================
 

documentation/migration-guides/migration-2.6.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.6 (thud)
 ==================
 

documentation/migration-guides/migration-2.7.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 2.7 (warrior)
 =====================
 

documentation/migration-guides/migration-3.0.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 3.0 (zeus)
 ==================
 

documentation/migration-guides/migration-3.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 3.1 (dunfell)
 =====================
 

documentation/migration-guides/migration-3.2.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 3.2 (gatesgarth)
 ========================
 

documentation/migration-guides/migration-3.3.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 3.3 (hardknott)
 =======================
 

documentation/migration-guides/migration-3.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Migration notes for 3.4 (honister)
 ----------------------------------
 

documentation/migration-guides/migration-4.0.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 4.0 (kirkstone)
 =======================
 

documentation/migration-guides/migration-4.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 4.1 (langdale)
 ======================
 

documentation/migration-guides/migration-general.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Introduction
 ============
 

documentation/migration-guides/release-3.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 3.4 (honister)
 ======================
 

documentation/migration-guides/release-4.0.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 4.0 (kirkstone)
 =======================
 

documentation/migration-guides/release-4.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release 4.1 (langdale)
 ======================
 

documentation/migration-guides/release-notes-3.4.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 3.4.1 (honister)
 ----------------------------------
 

documentation/migration-guides/release-notes-3.4.2.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 3.4.2 (honister)
 ----------------------------------
 

documentation/migration-guides/release-notes-3.4.3.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 3.4.3 (honister)
 ----------------------------------
 

documentation/migration-guides/release-notes-3.4.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 3.4.4 (honister)
 ----------------------------------
 

documentation/migration-guides/release-notes-3.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 3.4 (honister)
 --------------------------------
 

documentation/migration-guides/release-notes-4.0.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 4.0.1 (kirkstone)
 -----------------------------------
 

documentation/migration-guides/release-notes-4.0.2.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for Yocto-4.0.2 (Kirkstone)
 -----------------------------------------
 

documentation/migration-guides/release-notes-4.0.3.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for Yocto-4.0.3 (Kirkstone)
 -----------------------------------------
 

documentation/migration-guides/release-notes-4.0.4.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Releae notes for Yocto-4.0.4 (Kirkstone)
 -----------------------------------------
 

documentation/migration-guides/release-notes-4.0.5.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for Yocto-4.0.5 (Kirkstone)
 -----------------------------------------
 

documentation/migration-guides/release-notes-4.0.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 4.0 (kirkstone)
 ---------------------------------
 

documentation/migration-guides/release-notes-4.1.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for Yocto-4.1.1 (Langdale)
 ----------------------------------------
 

documentation/migration-guides/release-notes-4.1.rst

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
 Release notes for 4.1 (langdale)
 ---------------------------------