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

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https://hg.mozilla.org/integration/gaia-central/rev/abf22f65abbe
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #17855 from justindarc/bug990653

Bug 990653 - [Camera] Update unit tests for Activities

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https://hg.mozilla.org/integration/gaia-central/rev/8d2fc9839025
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 990653 - [Camera] Update unit tests for Activities
Bumping manifests a=b2g-bump