Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/fdb817bb9058
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #12090 from benfrancis/908927

Bug 908927 - Use templates instead of string concatenation for search URIs

========

https://hg.mozilla.org/integration/gaia-central/rev/03070fa85815
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 908927 - Use templates instead of string concatenation for search URIs

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "893d7a1cf6b6d12028a65246baa7f0674e0dfe35", 
+    "revision": "fdb817bb905899179e5d209b82e440e405583627", 
     "repo_path": "/integration/gaia-central"
 }