Bumping gaia.json for 1 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/565d16505778
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 897437 - SMS message timestamps do not display the expected strings. r=gnarf

Rewrote the message container handling function. Now with lots of unit tests
covering lots of edge cases.

This patch also does a very little bit of safe refactoring, still with unit
tests.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "050d7d00d95bfab132b2325b300f80bac1723774", 
+    "revision": "565d16505778a961898aa15d882b543657821ed1", 
     "repo_path": "/integration/gaia-central"
 }