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

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https://hg.mozilla.org/integration/gaia-central/rev/445a018f2e71
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #12100 from Seinlin/Bug-914459

Bug 914459 - Use keyboard's basicLayoutKey if it is defined. r=janjongboom

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https://hg.mozilla.org/integration/gaia-central/rev/e423894390ea
Author: Kaizhen <kli@mozilla.com>
Desc: Bug 914459 - Use keyboard's basicLayoutKey if it is defined.