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

Truncated some number of revisions since the previous bump.

========

https://hg.mozilla.org/integration/gaia-central/rev/e33eea638f98
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #14304 from RudyLu/keyboard/Bug930358-use_manifestURL_to_indentify_keyboardApp

Bug 930358 - Use manifestURL instead of app origin to identify a
r=gnarf, gary, arthur

========

https://hg.mozilla.org/integration/gaia-central/rev/a4854f794649
Author: Rudy Lu <left.lu@gmail.com>
Desc: Bug 930358 - Use manifestURL instead of app origin to identify a
keyboard (IME) app.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "a0459d28e2621d13656694988effb4576506064c", 
+    "revision": "e33eea638f98ba6850719e2f2f456f81cb40217a", 
     "repo_path": "/integration/gaia-central"
 }