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

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https://hg.mozilla.org/integration/gaia-central/rev/6e191494a8df
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #20139 from wilsonpage/1021284

Bug 1021284 - [camera] [flame] spinner appears after every photo capture

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https://hg.mozilla.org/integration/gaia-central/rev/7a3d9c17024b
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1021284 - [camera] [flame] spinner appears after every photo capture
Bumping manifests a=b2g-bump