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

========

https://hg.mozilla.org/integration/gaia-central/rev/8371602fc92e
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 922647 - Disable e.me tests on Travis to save time a=testonly r=me

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "f81a113f2decb2d01d168f8c4a7e1338d1319d85", 
+    "revision": "8371602fc92e8698e4c72425dc70ec0e99096322", 
     "repo_path": "/integration/gaia-central"
 }