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

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https://hg.mozilla.org/integration/gaia-central/rev/f2cf7db6a537
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #19856 from RudyLu/keyboard/Bug1013570_commit

Bug 1013570 - [B2G][Keyboard]Double or triple tapping on the spacebar.
r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/499f0f82afc8
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1013570 - [B2G][Keyboard]Double or triple tapping on the spacebar
can result in 2-3 periods, as well as deleted characters.
 - Send the next key after the previous sendKey is resolved.
Bumping manifests a=b2g-bump