Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/92b742f333b1
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #22422 from vingtetun/theme-color-landing

Bug 1047311 - Change the set of colors based on the brightness of the theme-color. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/34f31878c369
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1047311 - Change the set of colors based on the brightness of the theme-color. System part. r=kgrandon

========

https://hg.mozilla.org/integration/gaia-central/rev/2c301f182847
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1047311 - Change the set of colors based on the brightness of the theme-color. r=kgrandon

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "f297eacfc645c7634e86a31f7a857b1b056dedb8", 
+    "revision": "92b742f333b1f695de3de7c10316bc5ee652d084", 
     "repo_path": "/integration/gaia-central"
 }