Bumping gaia.json for 3 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/818de96f6d46
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #13967 from timdream/keyboard-pref-off2

Bug 941885 - Hide 3rd-party keyboard apps under a settings db entry, r=rudyl

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https://hg.mozilla.org/integration/gaia-central/rev/00fcc62090dd
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 941885 - Part 2, disable the feature for now

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https://hg.mozilla.org/integration/gaia-central/rev/63af38bc896a
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 941885 - Hide 3rd-party keyboard apps under a settings db entry

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "207f9be381480857de89714276df14dbc6ce5f43", 
+    "revision": "818de96f6d460b79e76767498c09aac9aada4ffe", 
     "repo_path": "/integration/gaia-central"
 }