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

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https://hg.mozilla.org/integration/gaia-central/rev/407d05c78d76
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #24751 from albertopq/1074033-overlap-statusbar-3

Bug 1074033 - Absolute positioning dialogs when hidden r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/afee5585bfb0
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1074033 - Absolute positioning dialogs when hidden
Bumping manifests a=b2g-bump