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

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https://hg.mozilla.org/integration/gaia-central/rev/2cb912d4cd59
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #22376 from mikehenrty/bug-1044984-disabled

Bug 1044984 - disabled intermittent worker_test.js, a=test-only

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https://hg.mozilla.org/integration/gaia-central/rev/df0b200f0233
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1044984 - disabled intermittent worker_test.js, a=test-only

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "e247a559e1a6915c4418ff08fa6a6dc6683e1d60", 
+    "revision": "2cb912d4cd59510943274a5ba3224e8efb88359d", 
     "repo_path": "/integration/gaia-central"
 }