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

========

https://hg.mozilla.org/integration/gaia-central/rev/489903115b80
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1022132 - Disable test_a11y_unlock_to_homescreen.py

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "80ec483ebdf66ac93205e34cac28ba90a13d77c5", 
+    "revision": "489903115b8067c6d565e37626213da4ba592331", 
     "repo_path": "/integration/gaia-central"
 }