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

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https://hg.mozilla.org/integration/gaia-central/rev/2828cb4d46eb
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #31257 from Cwiiis/bug1174727-new-homescreen-checkin

Bug 1174727 - Check in new homescreen. r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/f917ad3d2b6d
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1174727 - Check in new homescreen. r=timdream

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f9f000b23c0f02aa326600a0fa7b1f3690696004", 
+        "git_revision": "c0aef6d09c9954204ce8824172c9ed8b9b35be19", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "d948ac852b409b5efbaec596130d4ce254b2c606", 
+    "revision": "2828cb4d46eb4a4b0b85b332d55143ed7b3a5673", 
     "repo_path": "integration/gaia-central"
 }