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

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https://hg.mozilla.org/integration/gaia-central/rev/b2485bb1da40
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #14378 from jammink/temp

bug 938061 - final  - r=zac

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https://hg.mozilla.org/integration/gaia-central/rev/48f79f8eba5b
Author: John Hammink <john.hammink@gmail.com>
Desc: bug 938061 - final  - r=zac