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

========

https://hg.mozilla.org/integration/gaia-central/rev/13eb2abc198a
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #20556 from mcjimenez/bug1020158"

This reverts commit 06ea932d52fa5ec36285428c04ad6c7fdc413659, reversing
changes made to de4a53efe95f84e7f658d832d39ba2046448c3c8.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "ec2e6d719098a9fdfa88ad371b38787b46eb3390", 
+    "revision": "13eb2abc198a1cf02bdac765f4be67c2fdbc7d47", 
     "repo_path": "/integration/gaia-central"
 }