Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/d7e815eb184c
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #26596 from jrburke/bug1106888-email-clear-cache

Bug 1106888 - [email] Clear cookie cache once account creation starts r=asuth

========

https://hg.mozilla.org/integration/gaia-central/rev/81d78563004e
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1106888 - [email] Clear cookie cache once account creation starts

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "2e85f0f206133b3a3b82b14d9755ccefdea97637", 
+    "revision": "d7e815eb184c843a9d7e5784e99d5e39a31c59da", 
     "repo_path": "integration/gaia-central"
 }