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

========

https://hg.mozilla.org/integration/gaia-central/rev/77dca2916f12
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1044231 - Xfail test_everything_me_launch_link.py a=testonly r=me

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7dd5b4f4e6351f70c4eceb87374fff1d521644b8", 
+    "revision": "77dca2916f12424370e603c2ec1046c52cc0f037", 
     "repo_path": "/integration/gaia-central"
 }