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

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https://hg.mozilla.org/integration/gaia-central/rev/b8eae9817bd2
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #17861 from gaye/bug-987350

Bug 987350 - Migrate alarm_test.js to use new view code r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/e00e22596b46
Author: Gareth Aye <gaye@mozilla.com>
Desc: Bug 987350 - Migrate alarm_test.js to use new view code

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https://hg.mozilla.org/integration/gaia-central/rev/d75dc1c0083b
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #17893 from RudyLu/value_selector/remove-mozKeyboard

Bug 986992 - Remvoe navigator.mozKeyboard and use navigator.mozInputMethod
r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/63bd5af5a680
Author: Rudy Lu <me@rudy.lu>
Desc: Remove system app from mock keyboard app list.

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https://hg.mozilla.org/integration/gaia-central/rev/d1a51a625bd9
Author: Yuan Xulei <xyuan@mozilla.com>
Desc: Bug 986992 - Remvoe navigator.mozKeyboard and use navigator.mozInputMethod instead.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "14aa592477c10bcaed9bd95b7b6da4beaed20647", 
+    "revision": "b8eae9817bd2edc1b10c931c413fa453644388bb", 
     "repo_path": "/integration/gaia-central"
 }