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

========

https://hg.mozilla.org/integration/gaia-central/rev/61d1b4037b74
Author: Greg Weng (snowmantw) <gweng@mozilla.com>
Desc: Bug 906627 - [Camera][Helix] The flash light is still open after user pressed the home button

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "5ee261f9920114188c1becf2b710e86d0cb661ea", 
+    "revision": "61d1b4037b74bcbcfddfed9151fb9c67e4e01805", 
     "repo_path": "/integration/gaia-central"
 }