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

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https://hg.mozilla.org/integration/gaia-central/rev/356303b917b6
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 937094 -Python Re-enable test_everything_me_search.py

========

https://hg.mozilla.org/integration/gaia-central/rev/b519f4cd9375
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 937102 - Python Reenable test_sms_with_attachments.py r=me a=testonly

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "6c89720267bf5dd7e5ffe973c0492e05fbcfa4f6", 
+    "revision": "356303b917b6b8e583b9e1321dc1ba6d96fc3bcd", 
     "repo_path": "/integration/gaia-central"
 }