Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b2bf5e354e43
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #21233 from vingtetun/bug1032885

Bug 1032885 - Prevent the permission prompt dialog to steal the focus. r...

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https://hg.mozilla.org/integration/gaia-central/rev/b46f7e84391f
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1032885 - Prevent the permission prompt dialog to steal the focus. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/de3446aa6a4d
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #21231 from vingtetun/bug1032829

Bug 1032829 - Smart Collection stop beeing added once the collection app...

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https://hg.mozilla.org/integration/gaia-central/rev/03f75a04d46a
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1032829 - Smart Collection stop beeing added once the collection app has returned |false| (no user choice). r=kgrandon
Bumping manifests a=b2g-bump