ref-manual: Added GObject Introspection to 2.1 migration section.

(From yocto-docs rev: 0b9ee8da66ff81e0724465f18b0323f1216cb9fa)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/migration.xml

@@ -3199,6 +3199,21 @@
         </para>
     </section>
 
+    <section id='migration-2.1-supporting-gobject-introspection'>
+        <title>Supporting GObject Introspection</title>
+
+        <para>
+            This release supports generation of GLib Introspective
+            Repository (GIR) files through GObject introspection, which is
+            the standard mechanism for accessing GObject-based software from
+            runtime environments.
+            You can enable, disable, and test the generation of this data.
+            See the
+            "<ulink url='&YOCTO_DOCS_DEV_URL;#enabling-gobject-introspection-support'>Enabling GObject Introspection Support</ulink>"
+            section for more information.
+        </para>
+    </section>
+
     <section id='migration-2.1-miscellaneous-changes'>
         <title>Miscellaneous Changes</title>