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

========

https://hg.mozilla.org/integration/gaia-central/rev/313cc7a1747b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1095219 - Disable failing unit test, smart-home-test/unit/card_manager_test.js r=kgrandon

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "ce1789cc91feafe53596cfd0360cd12f7cc69d3b", 
+    "revision": "313cc7a1747bcdff251fa9d24a26391774b9e801", 
     "repo_path": "/integration/gaia-central"
 }