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

========

https://hg.mozilla.org/integration/gaia-central/rev/d251338e0961
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Bug 1043293 - [Verticalhome] use "touchend" instead of "click" to launch applications r=kgrandon"

This reverts commit 87ffc8423953bf052ed2b953c7f5e0133cbf1384.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "1b7211a77c0304ac7ac3c10db8b7fbe1a1e2a7a9", 
+    "revision": "d251338e0961296e655949ac637bfadbce5c1049", 
     "repo_path": "/integration/gaia-central"
 }