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

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https://hg.mozilla.org/integration/gaia-central/rev/6ca93485a5c0
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #13867 from timdream/lockscreen-unlock-transition3

Bug 937630 - All you need is ... smooth unlock transition, r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/003236d4187a
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 937630 - All you need is ... smooth unlock transition

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "e205210d717b22df20455dc4492d0fe9f7d4224d", 
+    "revision": "6ca93485a5c034253f5049c043dc151a03331c76", 
     "repo_path": "/integration/gaia-central"
 }