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

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https://hg.mozilla.org/integration/gaia-central/rev/da92dc3420b3
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #14514 from dwilsoncaf/video-stats

Bug 948095 - Output video statistics when playback stops, r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/11d58072c0c3
Author: Diego Wilson <dwilson@codeaurora.org>
Desc: Bug 948095 - Output video statistics when playback stops

These stats are useful for simple performance analysis.