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

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https://hg.mozilla.org/integration/gaia-central/rev/4e859fe652a3
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1127955 - merge pull request #27866 from jobara:1127955 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/b24733f12ca8
Author: Justin Obara <obara.justin@gmail.com>
Desc: Bug 1127955 - converted text to aria-label

Converted the past-other-month and future-other-month to be aria-labels instead of text nodes.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "15e8bdcfd34fb9d74de31976d2a7b4440ab2fadc", 
+        "git_revision": "360bb0f33c68b7c4475683f93507bf284db4c93a", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "78ce23e843ee8e0274df4efdd01360aab7c3885e", 
+    "revision": "4e859fe652a3123d3ddd4c1904509c110208f6b7", 
     "repo_path": "integration/gaia-central"
 }