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

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https://hg.mozilla.org/integration/gaia-central/rev/71c3528ff4e0
Author: sharfudheen.parambil <sharfudheen.parambil@lge.com>
Desc: Bug 860881 - Open screenshot in gallery from notification. r=alive
Bumping manifests a=b2g-bump