Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/1c2c8a4670be
Author: GaryChen(pychen) <mmm198219@gmail.com>
Desc: Merge pull request #13465 from mpizza/Bug_931229_v1.2

Bug 912033 - Pop down animation keyboard. r=GaryChen.

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https://hg.mozilla.org/integration/gaia-1_2/rev/aa4f61763c5f
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 912033 - Pop down animation keyboard