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

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https://hg.mozilla.org/integration/gaia-central/rev/5797e7d27cd5
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #22153 from pivanov/bug-1035696

Bug 1035696 - [Video] - check missing images

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https://hg.mozilla.org/integration/gaia-central/rev/1b000f10c6ec
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1035696 - [Video] - check missing images
Bumping manifests a=b2g-bump