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

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https://hg.mozilla.org/integration/gaia-central/rev/dc051b13b2a8
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #10903 from wanderview/contacts-full-defer-order-search

Bug 892155: Fully defer order/search string calc.  r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/67c38a9335da
Author: Ben Kelly <ben@wanderview.com>
Desc: Bug 892155: Fully defer order/search string calc

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "f8a85aceda9cff7e8db33eef10737a1c3e4533db", 
+    "revision": "dc051b13b2a88f590a5850f5074b20b497239e61", 
     "repo_path": "/integration/gaia-central"
 }