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

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https://hg.mozilla.org/integration/gaia-central/rev/8049c53d41a6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #14384 from yurenju/bug946480

Bug 946480 - Run adb remount when installing apps r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/3bf72a973eb5
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 946480 - Run adb remount when installing apps