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

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https://hg.mozilla.org/integration/gaia-central/rev/9c9b560f160e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23497 from zacc/bug_1060462

Bug 1060462 - Avert race condition in gaiatest when interacting with language select menu in Settings app

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https://hg.mozilla.org/integration/gaia-central/rev/af6ce7155433
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1060462 - Avert race condition in gaiatest when interacting with language select menu in Settings app r=qdot

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7e6c5414f073c6a6adfd1abb6bd2b0f48198440f", 
+    "revision": "9c9b560f160efc983ccd11d4176285980bb8109b", 
     "repo_path": "/integration/gaia-central"
 }