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

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https://hg.mozilla.org/integration/gaia-central/rev/3cec67806b29
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #22729 from mozmark/bug1027749

Bug 1027749 - Play sound doesn't seem to stop playing after you unlock t...

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https://hg.mozilla.org/integration/gaia-central/rev/8b24cb54562e
Author: Mark Goodwin <mgoodwin@mozilla.com>
Desc: Bug 1027749 - Play sound doesn't seem to stop playing after you unlock the device r=ggp

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "fd9106ef6db4c8901c342eea9afb14dfe0854a4f", 
+    "revision": "3cec67806b292bb7496c6c2367b735bb65440416", 
     "repo_path": "/integration/gaia-central"
 }