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

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https://hg.mozilla.org/integration/gaia-central/rev/d60ff6e69bf8
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11530 from alivedise/bugzilla_904534_master_v2

Bug 904534 - Use BrowserFrame to gen mozbrowser iframe in Window, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/e152d2ba1f0b
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 904534 - Use BrowserFrame to generate mozbrowser iframe in Window
Manager.