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

========

https://hg.mozilla.org/integration/gaia-central/rev/8309202d2b5d
Author: Robert Chira <robertchira@P5075.(none)>
Desc: Bug 1107460 - [v2.2] Update marionette version to 0.8.5

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "e1d288b463a09297ab158c99a5ce820a0fa069a0", 
+    "revision": "8309202d2b5dcb20faeab8115689d6b1664768ac", 
     "repo_path": "integration/gaia-central"
 }