Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/34308e903e51
Author: Julien Wajsberg <felash@gmail.com>
Desc: iBug 1050729 - Reduce overpaint of the sms app r=julien

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7a44d0a01a80882c71df05db01e7c6c35e8e78af", 
+    "revision": "34308e903e51d4a9d1f9924e39948412ecce4761", 
     "repo_path": "/integration/gaia-central"
 }