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

========

https://hg.mozilla.org/integration/gaia-central/rev/7ff699982f86
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #13594 from KevinGrandon/bug_937289_settings_keyboard_startup_path

Bug 937289 - [Settings] Remove keyboard_helper from startup path r=arthurcc

========

https://hg.mozilla.org/integration/gaia-central/rev/8b7387e7f936
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 937289 - [Settings] Remove keyboard_helper from startup path

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "0f6e4dcd16e1a8e42dbc64e1ca56f6950b242ada", 
+    "revision": "7ff699982f868613e4855c960c406313dd8af6f1", 
     "repo_path": "/integration/gaia-central"
 }