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

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https://hg.mozilla.org/integration/gaia-central/rev/02f6a299304a
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #12543 from huchengtw-moz/camera/Bug_921821_picture_size_larger_when_rotating

Bug 921821 - [Buri][Camera]The picture size larger than normally size wh...r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/3a0d5482ffd2
Author: John Hu <johu@mozilla.com>
Desc: Bug 921821 - [Buri][Camera]The picture size larger than normally size when you rotate the phone to landscape mode