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

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https://hg.mozilla.org/integration/gaia-central/rev/0a7e29cefaea
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20520 from RudyLu/ime/Bug1013837_ime_menu_styleUpdate

Bug 1013837 - Adjust the style of ime menu.
r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/67c0fc31d29b
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1013837 - Adjust the style of ime menu.
Bumping manifests a=b2g-bump