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

========

https://hg.mozilla.org/integration/gaia-central/rev/4188aeaa6414
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #17505 from viorelaioia/bug_986462

Bug 986462 - Unxfail test_dialer_find_contact as Bug 983054 is fixed

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https://hg.mozilla.org/integration/gaia-central/rev/ecb3212a1066
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 986462 - Unxfail test_dialer_find_contact as Bug 983054 is fixed

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "c7df3a8049fe1ba5c364f436b003426a0fafb85f", 
+    "revision": "4188aeaa641427e5a4f6226ebc81cbd9c1e5d97d", 
     "repo_path": "/integration/gaia-central"
 }