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

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https://hg.mozilla.org/integration/gaia-central/rev/82aa7db46a22
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #17629 from RudyLu/keyboard/Bug956175-switch_language

Bug 956175 - [keyboard refactor] handle language switching.
r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/2a7bb3d14e82
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 956175 - [keyboard refactor] handle language switching.
 - Add KeyboardLayoutManager, load layout definition file dynamically.
 - Change the format of layout definition from js to json.
 - Add unit tests.
Bumping manifests a=b2g-bump