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

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https://hg.mozilla.org/integration/gaia-central/rev/f83c3d7203b3
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #26519 from alivedise/bugzilla/1076605_master/revive-browser

Bug 1076605 - app is killed between launch and open, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/a0f1a52d47fc
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1076605 - app is killed between launch and open
Bumping manifests a=b2g-bump