Bump branch number after creating branch stabilize-12088.B.

Change-Id: I81aa02362462f3bc05c9527d92a10bfd51a22916
diff --git a/chromeos/config/chromeos_version.sh b/chromeos/config/chromeos_version.sh
index 9aad190..3611d62 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.
-  CHROMEOS_BRANCH=0
+  CHROMEOS_BRANCH=1
 
   # Patch number.
   # Increment by 1 in case a non-scheduled branch release build is necessary.