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

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https://hg.mozilla.org/integration/gaia-central/rev/08b27cc9d095
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #10897 from fzzzy/master

Bug 887454 Remove UA override for youtube.com r=benfrancis

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https://hg.mozilla.org/integration/gaia-central/rev/6dec3dcf2176
Author: Donovan Preston <donovanpreston@gmail.com>
Desc: bug 887454 Remove ua override for youtube.com

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "5e60cb6fc0e09cefe242a6fb0159fbd09360cc1a", 
+    "revision": "08b27cc9d095200a10008924a417ad7303b19d4e", 
     "repo_path": "/integration/gaia-central"
 }