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

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https://hg.mozilla.org/integration/gaia-central/rev/6f0a49bd8596
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #13421 from cctuan/932669

Bug 934894 - [Flatfish]CardView snapshot are in portrait

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https://hg.mozilla.org/integration/gaia-central/rev/2d4889a6418e
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 932669 - [Flatfish][Camera] Preview is in wrong direct