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

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https://hg.mozilla.org/integration/gaia-central/rev/2046974aa9b0
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #16711 from zacc/bug_977519

Bug 977519 - Intermittent in test_camera_capture_video

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https://hg.mozilla.org/integration/gaia-central/rev/da348b565403
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 977519 - Intermittent in test_camera_capture_video
Bumping manifests a=b2g-bump