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

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https://hg.mozilla.org/integration/gaia-central/rev/2c22e1a3d56e
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #14336 from gasolin/issue-944653

Bug 944653 - [Flatfish] scale system dialogs and 2 button menu correctly, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/58190e698503
Author: gasolin <gasolin@gmail.com>
Desc: Bug 944653 - [Flatfish] scale dialog & menu with 2 button correctly