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

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https://hg.mozilla.org/integration/gaia-central/rev/feceb779e5d2
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11754 from snowmantw/issue905915

Bug 905915 - [Keyboard] Need to adjust the layout of keyboard FTU in landscape mode, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/22c199df8e8a
Author: Greg Weng (snowmantw) <gweng@mozilla.com>
Desc: Bug 905915 - [Keyboard] Need to adjust the layout of keyboard FTU in landscape mode