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

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https://hg.mozilla.org/integration/gaia-central/rev/7aa20b5c7770
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #31070 from timdream/keyboard-worker-test

Bug 1044984 - Start seperate worker to run each of the worker.js tests, r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/7e390970d2ed
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 1044984 - Start seperate worker to run each of the worker.js tests

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "de243eb108a6d04d5a8f7382b8f8f785c4606df2", 
+        "git_revision": "b10968e87933365014f9b2b890301c0596609db3", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "9ffcca8b5fcf8adb0c7ac09ebf347abbd5a1b72b", 
+    "revision": "7aa20b5c777097e6fa42b68b284373e90bba4298", 
     "repo_path": "integration/gaia-central"
 }