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

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https://hg.mozilla.org/integration/gaia-central/rev/3c3706bd5581
Author: Corey Frang <gnarf37@gmail.com>
Desc: Bug 921317 – [Gaia] Transform Animation in the clock app is wrong - r=jugglinmike

- Allow hashchange to initiate navigation instead of emitting 'selected' event from tabs
- Remove emitter from tabs since it doesn't need to emit anything anymore

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https://hg.mozilla.org/integration/gaia-central/rev/fdfbe5e1411c
Author: Corey Frang <gnarf37@gmail.com>
Desc: Revert Temporary Workaround from Bug 926587

Revert "Bug 926587 - [B2G][Clock][Stopwatch] Choppy transition animation going to Stopwatch from Timer or Alarm - r=jugglinmike"

This reverts commit af77086d88d66ba75dc040e4cd2fa6990be2b0bf.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "cb7228e13dd0018400dfd857c83d7498a7ce2a0e", 
+    "revision": "3c3706bd5581eb1ff85449470892ae0dabc5ab6b", 
     "repo_path": "/integration/gaia-central"
 }