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

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https://hg.mozilla.org/integration/gaia-central/rev/582a3fd8e772
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #12807 from gasolin/issue-923866

Bug 923866 - HD: fix keyboard FTU in different resolutions, r=rudy

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https://hg.mozilla.org/integration/gaia-central/rev/2b2dd2d79e8e
Author: gasolin <gasolin@gmail.com>
Desc: Bug 923866 - HD: fix keyboard FTU in different resolutions