Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/b0fc52cca593
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #12687 from KevinGrandon/bug_923876_remove_pragma_nocache

Bug 923876 - Remove pragma no-cache from gaia applications r=vingtetun

========

https://hg.mozilla.org/integration/gaia-central/rev/206f65abe48f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 923876 - Remove pragma no-cache from gaia applications

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "101abd716d8f0fdefac1693cf0f9738185aa0b3f", 
+    "revision": "b0fc52cca5934916d3bf62efd200c0a46f34548d", 
     "repo_path": "/integration/gaia-central"
 }