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

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https://hg.mozilla.org/integration/gaia-central/rev/a96d83d7e0bb
Author: Sam Joch <samuel@guiora.com>
Desc: Merge pull request #11701 from pivanov/bug-907186

Bug 907186 - [FMRadio] Star isn't centered on the button r=samjoch

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https://hg.mozilla.org/integration/gaia-central/rev/a317014d8adc
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 907186 - [FMRadio] Star isn't centered on the button