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

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https://hg.mozilla.org/integration/gaia-central/rev/92480849c983
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #11595 from cctuan/903919

Bug 903919 - [Flatfish][Gallery] add support for large device

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https://hg.mozilla.org/integration/gaia-central/rev/bc53a5c1b075
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 903919 - [Flatfish][Gallery] add support for large device