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

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https://hg.mozilla.org/integration/gaia-central/rev/f817111544ce
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #16681 from alivedise/bugzilla/976846_master/update-active-app-early

Bug 976846 - Update active app earlier, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/0e31f3e31300
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 976846 - Update active app earlier
Bumping manifests a=b2g-bump