Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/30014779028e
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1004985 - Close screenshot notification when user responds to it. r=timdream
Bumping manifests a=b2g-bump