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

========

https://hg.mozilla.org/integration/gaia-central/rev/2f7fa802679f
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #11637 from gabrielesvelto/bug-891762-wap-push

Bug 891762 - Add an application for displaying WAP Push messages r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/2211adc53961
Author: Gabriele Svelto <gabriele.svelto@gmail.com>
Desc: Bug 891762 - Add an application for displaying WAP Push messages

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "28ab56156acd7bf828476f31f54dd40d3a2a7cd1", 
+    "revision": "2f7fa802679f9ebfcd2021865aaf2ece4adae34f", 
     "repo_path": "/integration/gaia-central"
 }