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

Truncated some number of revisions since the previous bump.

========

https://hg.mozilla.org/integration/gaia-central/rev/6a1167f9fb7b
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #13184 from julienw/932318-fix-jshint

Bug 932318 - [Messages] jshint fixes from bug 901852 and bug 927783 r=rw...

========

https://hg.mozilla.org/integration/gaia-central/rev/94f2922c99ec
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 932318 - [Messages] jshint fixes from bug 901852 and bug 927783 r=rwaldron

Fix also a unit test issue.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "bec42064814ad2e335ec4aa9cef8013c658623a9", 
+    "revision": "6a1167f9fb7b32aff1a6d2a2403d7029e7e4c8ab", 
     "repo_path": "/integration/gaia-central"
 }