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

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https://hg.mozilla.org/integration/gaia-central/rev/69c79383c797
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #10777 from gasolin/master-881136

Bug 881136 - hdpi/xhdpi resolution assets and layout for Browser app, r=dale

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https://hg.mozilla.org/integration/gaia-central/rev/130d7b0f10fb
Author: gasolin <gasolin@gmail.com>
Desc: Bug 881136 - hdpi/xhdpi resolution assets and layout for Browser app