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

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https://hg.mozilla.org/integration/gaia-central/rev/da1b66f8c12f
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #22594 from justindarc/bug1049198

Bug 1049198 - Camera/Video should use mark Color layer as [not visible] ...

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https://hg.mozilla.org/integration/gaia-central/rev/3677006e1531
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 1049198 - Camera/Video should use mark Color layer as [not visible] when covered by video

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "0efeae66a0b0150e80f053fbb58df89ee66db9bc", 
+    "revision": "da1b66f8c12fbb8a680ed11ba95529f107d2d887", 
     "repo_path": "/integration/gaia-central"
 }