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

========

https://hg.mozilla.org/integration/gaia-central/rev/d08fc06a3a2b
Author: Evelyn Eastmond <evhan55@gmail.com>
Desc: Bug 959696 - [Messages][Drafts][Refactoring] Move draft saving on visibility change to ThreadUI, and only store drafts if new one is saved r=rwaldron

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "279e83268afddea7ff3c87181571fd8ce2a193d4", 
+    "revision": "d08fc06a3a2b60b0d7defb7f48b70639ac74f4bc", 
     "repo_path": "/integration/gaia-central"
 }