Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f8606bfcbca1
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1119031 - merge pull request #28113 from mikehenrty:bug-1119031-rtl-system-update to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/f5fb2cf5ec71
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1119031 - Right align System Update dialog title in RTL

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https://hg.mozilla.org/integration/gaia-central/rev/77c499d2ce22
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1131023 - merge pull request #28073 from KevinGrandon:bug_1131023_enter_private_browsing_window to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/3e329089b0a5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1131023 - [Search] Add trigger for private browser r=mhenretty

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https://hg.mozilla.org/integration/gaia-central/rev/b99e4aaced9f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1131023 - [Components] Add inline class to gaia-buttons

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "2130a414247340384b5aa9a88918c74b074b7fa1", 
+        "git_revision": "ab6a486f14f51058db681c0d63945bae31c1467e", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e7d58e664bbf87bafbad9d4e76fde06bc5bb3b30", 
+    "revision": "f8606bfcbca10571ed4fb6d551dcddd253cc3d54", 
     "repo_path": "integration/gaia-central"
 }