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

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https://hg.mozilla.org/integration/gaia-1_4/rev/02861cb9c848
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-1_4/rev/c16b2a7022d2
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #17955 from justindarc/bug991813

Bug 991813 - [Camera] Zoom Bar jumps on orientation change
Bumping manifests a=b2g-bump