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

========

https://hg.mozilla.org/integration/gaia-central/rev/5c5ece219355
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 981711 - [Messages] Bug 947180 broke the SIM switch r=schung

This patch restores the SIM switching functionality using the iccId property.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "7f72557f207e98443fe5e474eb578d5d0322db71", 
+    "revision": "5c5ece219355b69ecab604bfe9241dc7aaf9de22", 
     "repo_path": "/integration/gaia-central"
 }