Bumping gaia.json for 1 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/d2343a615807
Author: William Chen <wchen@mozilla.com>
Desc: Bug 782211 - Update Gaia with additional functionality to support Notification API.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "775b20c42b5220f79af35fb94ad53925eb6b7aea", 
+    "revision": "d2343a61580787083ca39707e97f43d0f25a300f", 
     "repo_path": "/integration/gaia-central"
 }