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

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https://hg.mozilla.org/integration/gaia-central/rev/6844e79240a4
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #12233 from gasolin/issue-916524

Bug 916524 - [Browser]Add video-capture permission to browser, r=ben

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https://hg.mozilla.org/integration/gaia-central/rev/99f0b03e891b
Author: gasolin <gasolin@gmail.com>
Desc: Bug 916524 - [Browser]Add video-capture permission to browser