Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/99221faf6bd0
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #20332 from alivedise/bugzilla/1021270/smart-collection

Bug 1021270 - Focus the top active window while permission dialog hide, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/3bcc0cba268c
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1021270 Part2: Using loaded handler to focus

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https://hg.mozilla.org/integration/gaia-central/rev/2243dfd5d58e
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1021270 - Focus the top active window while permission dialog hide
Bumping manifests a=b2g-bump