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

========

https://hg.mozilla.org/integration/gaia-central/rev/bc78fbad02de
Author: Ed Morley <emorley@mozilla.com>
Desc: Revert "Bug 988519 - [Camera] Improve localization" for gaia-unit test failures

This reverts commit 5f3874235f25e0cfdcaf3af239f8238b34426461.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "8b749da3986f791934ba824cc7e7be0194381362", 
+    "revision": "bc78fbad02de9043c1c92222b5450e0542d40a19", 
     "repo_path": "/integration/gaia-central"
 }