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

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https://hg.mozilla.org/integration/gaia-central/rev/3729e5ab196a
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13606 from AndreiH/bug937522

Bug 937522 - Xfali test_export_contacts_to_sdcard

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https://hg.mozilla.org/integration/gaia-central/rev/65bd52cdd896
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 937522 - Xfali test_export_contacts_to_sdcard

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "27ec5ebd50d4b6996c24f7adb9c231530c84a08f", 
+    "revision": "3729e5ab196a0e50ea47cefbda3b51c1806d3067", 
     "repo_path": "/integration/gaia-central"
 }