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

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https://hg.mozilla.org/integration/gaia-central/rev/f4c0b567dce4
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1129238 - merge pull request #27911 from fcampo:barring-trunc-text-1129238 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/c10c2da8814d
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Bug 1129238 - Truncated text on call barring (r=arthurcc)

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "322f39ba79e689b5deb0be1571c3402db971a61f", 
+        "git_revision": "aebb6db430730e2724a31fa64932c86fca9eb71b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "7f5ddd1615ed93828054aa18627a8c02fa9bc192", 
+    "revision": "f4c0b567dce41c68d429b032e297278453edc4fa", 
     "repo_path": "integration/gaia-central"
 }