Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/d4e462e8a0d7
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #16381 from huchengtw-moz/video/Bug_947103_v1.3

Bug 947103 - [Video] Update to refreshed video player

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https://hg.mozilla.org/integration/gaia-1_3/rev/e8b2f3125776
Author: John Hu <johu@mozilla.com>
Desc: Bug 947103 - [Video] Update to refreshed video player