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

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https://hg.mozilla.org/integration/gaia-central/rev/0b1687927faa
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #17400 from eeejay/bug-986165

Bug 986165 - [keyboard] Hide button bubbles properly. r=rudyl

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https://hg.mozilla.org/integration/gaia-central/rev/c638652ee12f
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 986165 - [keyboard] Hide button bubbles properly.
Bumping manifests a=b2g-bump