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

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https://hg.mozilla.org/integration/gaia-central/rev/7b0fa72c83a8
Author: Mihai Cîrlănaru <mihai@cirlanaru.com>
Desc: Merge pull request #12005 from mcirlanaru/bug_913782

Bug 913782 - [Keyboard] Update build settings for 3rd party keyboard... r=@yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/cbd196030122
Author: Mihai Cirlanaru <mihai@cirlanaru.com>
Desc: Bug 913782 - [Keyboard] Update build settings for 3rd party keyboard support. r=yurenju, f=rudyl