Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9f96af5a6624
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #16559 from timdream/keyboard2-keyboard

Bug 975963 - Split keyboard.js into instancable KeyboardApp() and boot.js, r=rudyl

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https://hg.mozilla.org/integration/gaia-central/rev/28af01faecb1
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 975963 - Split keyboard.js into instancable KeyboardApp() and boot.js

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "caa72fd28c9f97de4af3aea363322382518f07fa", 
+    "revision": "9f96af5a6624a48406a7ef4540266c6480868da3", 
     "repo_path": "/integration/gaia-central"
 }