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

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https://hg.mozilla.org/integration/gaia-central/rev/5cc8f89e8b18
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #14232 from brunovilar/master

Bug 944632 - Add video capture permission to SYSTEM app to enable BOOKMA..., r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/69f53f0cd0d8
Author: Bruno Vilar <brunovilar@gmail.com>
Desc: Bug 944632 - Add video capture permission to SYSTEM app to enable BOOKMARKED web pages acquires gUM