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

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https://hg.mozilla.org/integration/gaia-central/rev/d2e692ff0453
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #13859 from MBRSL/bug-940802-style

Bug 940802 - [UITest] style fix, r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/d7cdef6711eb
Author: Tom Jao <tjao@mozilla.com>
Desc: Bug 940802 - [UITest] style fix