Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/4f9b71ccf077
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #27295 from anefzaoui/settings-rtl-refactor

Bug 1120194 - Refactor RTL styling for Settings App, r=kaze

========

https://hg.mozilla.org/integration/gaia-central/rev/24bd108b5f86
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1120194 - Refactor RTL styling for Settings App

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "89fdf202fdfbc815e9e5993b56f8ea8f1ea61272", 
+    "revision": "4f9b71ccf0770ad99ba7f802d951f569e10b1021", 
     "repo_path": "integration/gaia-central"
 }