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

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https://hg.mozilla.org/integration/gaia-central/rev/cba83cc33359
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #10714 from timdream/remove-responsive

Bug 870318 - Remove the poor man's multi-resolution support, r=basiclines

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https://hg.mozilla.org/integration/gaia-central/rev/db5d8f1c43e9
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 870318 - Remove the poor man's multi-resolution support