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

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https://hg.mozilla.org/integration/gaia-central/rev/d9e07db2d051
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #12418 from eeejay/bug-914892

Bug  914892 - Condense pack-switch/pack-checkbox/pack-radio markup. r=arnau

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https://hg.mozilla.org/integration/gaia-central/rev/e961c9d9c749
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 914892 - [Settings] Move checkbox labels inside of labels.

Make pack checkbox/radio/switch use span:after so we could use the span for something useful.