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

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https://hg.mozilla.org/integration/gaia-central/rev/a6f05cfffc0b
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #14184 from pivanov/bug-944413

Bug 944413 - [Browser Settings] Fix layout and alignment

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https://hg.mozilla.org/integration/gaia-central/rev/ca01fd409197
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 944413 - [Browser Settings] Fix layout and alignment