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

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https://hg.mozilla.org/integration/gaia-central/rev/09cdef322298
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #10836 from rexboy7/fixhd-881147-fm-master

Bug 881138 - [HD][FM] @1.5x assets update

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https://hg.mozilla.org/integration/gaia-central/rev/334173f02a33
Author: Rex Lee <rexboy@mozilla.com>
Desc: Bug 881138 - [HD][FM] @1.5x assets update