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

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https://hg.mozilla.org/integration/gaia-1_4/rev/a6e82e5c2697
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #22510 from RudyLu/keyboard/Bug1019360

Bug 1019360 - [v1.4] Keyboard will not work if do as follow before keyboard.
r=timdream.

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https://hg.mozilla.org/integration/gaia-1_4/rev/ca921e0a1c9c
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1019360 - [v1.4] Keyboard will not work if do as follow before
keyboard shows completely.
Bumping manifests a=b2g-bump