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

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https://hg.mozilla.org/integration/gaia-central/rev/8af85c076ddc
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #26881 from albertopq/1112520-icons-rocketbar

Bug 1112520 - Checking statusbar maximized after collapse rocketbar r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/57b806139092
Author: albertopq <albert.pastor@gmail.com>
Desc: Bug 1112520 - Checking statusbar maximized after collapse rocketbar
Bumping manifests a=b2g-bump