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

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https://hg.mozilla.org/integration/gaia-central/rev/92fa69a58527
Author: Sam Joch <samuel@guiora.com>
Desc: Merge pull request #11204 from pivanov/bug-898792

Bug 898792 - [Dialer] - The bottom buttons are not the same height r=samjoch

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https://hg.mozilla.org/integration/gaia-central/rev/3fea3cec7c79
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 898792 - [Dialer] - The bottom buttons are not the same height