documentation: Added February 2013 as release date for 1.3.1

I added this date as the release date for the five manuals
that have a manual history table.

(From yocto-docs rev: 5f107aab8bd2de0be78163eaf356656ddae4bf5f)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/adt-manual/adt-manual.xml

@@ -56,7 +56,7 @@
             </revision>
             <revision>
                 <revnumber>1.2.2</revnumber>
-                <date>Sometime in 2013</date>
+                <date>February 2013</date>
                 <revremark>Released with the Yocto Project 1.2.2 Release.</revremark>
             </revision>
         </revhistory>

documentation/bsp-guide/bsp-guide.xml

@@ -68,7 +68,7 @@
             </revision>
             <revision>
                 <revnumber>1.2.2</revnumber>
-                <date>Sometime in 2013</date>
+                <date>February 2013</date>
                 <revremark>Released with the Yocto Project 1.2.2 Release.</revremark>
             </revision>
         </revhistory>

documentation/dev-manual/dev-manual.xml

@@ -46,7 +46,7 @@
             </revision>
             <revision>
                 <revnumber>1.2.2</revnumber>
-                <date>Sometime in 2013</date>
+                <date>February 2013</date>
                 <revremark>Released with the Yocto Project 1.2.2 Release.</revremark>
             </revision>
         </revhistory>

documentation/kernel-manual/kernel-manual.xml

@@ -61,7 +61,7 @@
             </revision>
             <revision>
                 <revnumber>1.2.2</revnumber>
-                <date>Sometime in 2013</date>
+                <date>February 2013</date>
                 <revremark>Released with the Yocto Project 1.2.2 Release.</revremark>
             </revision>
         </revhistory>

documentation/poky-ref-manual/poky-ref-manual.xml

@@ -75,7 +75,7 @@
             </revision>
             <revision>
                 <revnumber>1.2.2</revnumber>
-                <date>Sometime in 2013</date>
+                <date>February 2013</date>
                 <revremark>Released with the Yocto Project 1.2.2 Release.</revremark>
             </revision>
         </revhistory>