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

========

https://hg.mozilla.org/integration/gaia-central/rev/d4ec6c8c9cfc
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 1157216 - [tv_apps] Use textContent instead of innerHTML in screen reader speech caption. r=alive

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "d21634aa49f980f34e8d1b0928af4eb6b1799fd8", 
+        "git_revision": "0636405f0844bf32451a375b2d61a2b16fe33348", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "a895dc9dd065ef864f174fe27e4d9aa3428a2421", 
+    "revision": "d4ec6c8c9cfc10a495e5c6cfddeb71871be73106", 
     "repo_path": "integration/gaia-central"
 }