Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/284a417c898e
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1135233 - merge pull request #29129 from FunkTron:Bug1135233 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/781f1d51a43d
Author: Ross <bugzilla@imross.com>
Desc: Bug 1135233 - Made sure #statusbar-tray icons are accessible when utility tray is open

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https://hg.mozilla.org/integration/gaia-central/rev/ea54ea169526
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1152683 - merge pull request #29778 from mcav:replyto to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/0fa0e9985249
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1152683 - [email] reply-to header ignored. r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/dee998f7ce82
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1156089 - merge pull request #29583 from KevinGrandon:bug_1156089_fl_jshint to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/180b19c07b96
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1156089 - Fix remaining fl jshint issues

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "92b2e038cbbe9c9ab1e5783c48da1442fb5b4537", 
+        "git_revision": "d0bf656cdfa9d69721608c30bb5a79886b5e64d3", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "c2e68e12cf547e5aef9b47e19c79649e2e8a8401", 
+    "revision": "284a417c898e037c4ea21d52af81e7c6adabbaab", 
     "repo_path": "integration/gaia-central"
 }