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

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https://hg.mozilla.org/integration/gaia-central/rev/dcae8edae13b
Author: Luke Chang <lchang@mozilla.com>
Desc: Merge pull request #12142 from luke-chang/900906_pinyin_in_worker

Bug 900906 - [Keyboard] Wrap the pinyin IME engine with web worker, r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/af4356d09549
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 900906 - [Keyboard] Wrap the pinyin IME engine with web worker