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

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https://hg.mozilla.org/integration/gaia-central/rev/9d2a5777d581
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #17928 from justindarc/bug991354

Bug 991354 - [Camera][Madai] X in cancel button not centered. Pick activ...

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https://hg.mozilla.org/integration/gaia-central/rev/f0444963977f
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 991354 - [Camera][Madai] X in cancel button not centered. Pick activity UI
Bumping manifests a=b2g-bump