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

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https://hg.mozilla.org/integration/gaia-central/rev/cadab6aa942c
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #17828 from mcav/reland-integration-tests

Bug 971135 - [Clock] Port all Clock integration tests from Python to Jav...

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https://hg.mozilla.org/integration/gaia-central/rev/d4ed08f6b8f2
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 971135 - [Clock] Port all Clock integration tests from Python to JavaScript. r=millermedeiros

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "1ce2678b36c455d39277c47b93a3d9b0b8231370", 
+    "revision": "cadab6aa942c501bafd6d89d870a08ebb63733b9", 
     "repo_path": "/integration/gaia-central"
 }