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

========

https://hg.mozilla.org/integration/gaia-central/rev/c7b379544ede
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1106420 - Disable intermittent test, apps/system/test/marionette/media_playback_test.js | media playback tests should hide now playing info by exiting r=kgrandon

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "994896b89ba10cad39a87f90eeaba9ae5e17c3a6", 
+        "git_revision": "69e0ce4bd24909896fac7689880a30aad659e771", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "4c9dce5fc4335430c5dfa179ee8ba3972bb637cd", 
+    "revision": "c7b379544ededd138fecb007f8e9560407ad7c0e", 
     "repo_path": "integration/gaia-central"
 }