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

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https://hg.mozilla.org/integration/gaia-central/rev/33a3a3796882
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #12414 from alivedise/bugzilla/905116_master_v7

Bug 905116 - Implement Homescreen Window + Homescreen Launcher, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/e1e47585c181
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 905116 - Implement Homescreen Window + Homescreen Launcher