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

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https://hg.mozilla.org/integration/gaia-central/rev/c1bf2931db26
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #31657 from Cwiiis/bug1200911-new-homescreen-button-dismiss-dialog

Bug 1200911 - Homescreen button should dismiss dialogs. r=albertopq

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https://hg.mozilla.org/integration/gaia-central/rev/b3dbce0dab24
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1200911 - Homescreen button should dismiss dialogs. r=albertopq

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "ac07d7fc6b36c5852d58f4e1bcbfca9ac664b2d3", 
+        "git_revision": "c63633bd2f7c69d02246fab1d5d35d3a169b3e02", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "bb91d168045c58de7db2003759132c1c64a46290", 
+    "revision": "c1bf2931db26accbcd2479d4da566328d03f3587", 
     "repo_path": "integration/gaia-central"
 }