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

========

https://hg.mozilla.org/integration/gaia-central/rev/3b0c3f521583
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1121766 - Disable intermittent failing test, TEST-UNEXPECTED-FAIL | apps/sms/test/marionette/composer_test.js | Messages Composer Messages Composer Test Suite Message char counter and MMS label

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "e3c4a8e9415ba170d4bf9994e1ff8c060d9c8531", 
+    "revision": "3b0c3f5215830078cd1a15e4e916d016bf3ffe77", 
     "repo_path": "integration/gaia-central"
 }