Automatic: x86-mario-release - Updating to a new version number from 6812.12.0

Change-Id: I28f8b6230f369aeb562b0c2ce5aab77e6046b4a5
diff --git a/chromeos/config/chromeos_version.sh b/chromeos/config/chromeos_version.sh
index f6b6705..3a3bf88 100755
--- a/chromeos/config/chromeos_version.sh
+++ b/chromeos/config/chromeos_version.sh
@@ -20,7 +20,7 @@
   # Release Branch number.
   # Increment by 1 for every release build on a branch.
   # Reset to 0 when increasing release build number.
-  export CHROMEOS_BRANCH=12
+  export CHROMEOS_BRANCH=13
 
   # Patch number.
   # Increment by 1 in case a non-scheduled branch release build is necessary.