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

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https://hg.mozilla.org/integration/gaia-central/rev/db680b3de9af
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #22247 from alivedise/bugzilla/1045520/default-background-is-white

Bug 1045520 - default background is white, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/bccaa4fb1a6b
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1045520 - default background is white

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "d7d92199ea7e8f850ca0c6f0514bf596f178a16f", 
+    "revision": "db680b3de9af8136a778ac6be911e5e7f0aab7c8", 
     "repo_path": "/integration/gaia-central"
 }