Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/4071de568c62
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1149936 - merge pull request #29300 from sfoster:ftu-fb-import-contacts-rtl-bug-1149936 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/c09a5241b6b9
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1149936 - Add RTL rule for FB import icon. r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/40654dae83ac
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1150143 - merge pull request #29301 from KevinGrandon:bug_1150143_guard_against_early_closing to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/6d7b530ab22a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1150143 - [Rocketbar] Safeguard home button to finish activation

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "62042ffcc8c6cca0f51ad23f5c2b979fc153b5a7", 
+        "git_revision": "841f03d3b58bc167c00d65edd4f6327aa9edd409", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "4b56fba8a50f20300465f09ae79b123e77ddc858", 
+    "revision": "4071de568c62601947a0f7c9a32f9eec3dbf79e1", 
     "repo_path": "integration/gaia-central"
 }