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

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https://hg.mozilla.org/integration/gaia-central/rev/bbd08618e170
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #11013 from fabi1cazenave/otaUpdateI18n-bug828260

Bug 828260: translate update prompt after locale switch, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/9a42d3e7a545
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Bug 828260: translate update prompt after locale switch, r=timdream