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

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https://hg.mozilla.org/integration/gaia-central/rev/563d1aa93586
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #12904 from cctuan/927345

Bug 927345 - The sorting of video group in gallery view is not correct

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https://hg.mozilla.org/integration/gaia-central/rev/33205118c316
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 927345 - The sorting of video group in gallery view is not correct