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

========

https://hg.mozilla.org/integration/gaia-central/rev/417bf1d46811
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #12096 from eeejay/bug-914886

Bug 914886 - [Settings] Use aria-disabled instead of disabled class. r=kaze

========

https://hg.mozilla.org/integration/gaia-central/rev/60cefe0026b2
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 914886 - [Settings] Use aria-disabled instead of disabled class

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "5e508da44d21d83064ecbea176b501fd620055ba", 
+    "revision": "417bf1d46811a16b142b57c3fa73cc0f9a92c801", 
     "repo_path": "/integration/gaia-central"
 }