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

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https://hg.mozilla.org/integration/gaia-central/rev/9f37d18ae352
Author: huchengtw-moz <johu@mozilla.com>
Desc: Merge pull request #10365 from huchengtw-moz/video/Bug_881474_spinner_shows_forever

Bug 881474 - [video] with youtube video paused, dragging slider makes sp..., r=@djf, a=leo+

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https://hg.mozilla.org/integration/gaia-central/rev/4b036c915881
Author: John Hu <johu@mozilla.com>
Desc: Bug 881474 - [video] with youtube video paused, dragging slider makes spinner go forever.