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

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https://hg.mozilla.org/integration/gaia-central/rev/2f4600ab2988
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #14627 from askeing/949552

Bug 949552 - Fix test_gallery_delete_image

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https://hg.mozilla.org/integration/gaia-central/rev/8bad640ac1b8
Author: askeing <askeing@gmail.com>
Desc: Bug 949552 - Fix test_gallery_delete_image