Bumping gaia.json for 1 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/a96fa7bf0b09
Author: b2gautomation <jonallengriffin@gmail.com>
Desc: Bug 907941 - gaia-ui-tests-pushbot (see bug)

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "bdac3547cbc0423bcdcf3b1650be326bfd1c601f", 
+    "revision": "a96fa7bf0b09b7f702279cdd66f0141e5134b541", 
     "repo_path": "/integration/gaia-central"
 }