Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/be24597ea853
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1162383 - Follow-up, guard variable for existance r=hotfix

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "2d89ebc715407221cc2ab8538eaba8cc4b98188c", 
+        "git_revision": "23b474eec73690fc4c0cdc7c1260b4308687d51b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "21209420c9c24470057dc94fc0029d6f412ee76e", 
+    "revision": "be24597ea85334ec6123f0c2705ae82138121a9d", 
     "repo_path": "integration/gaia-central"
 }