Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/0eef3cf5ff44
Author: Chris AtLee <catlee@mozilla.com>
Desc: Revert "Bug 852321: Update xulrunner SDK to reduce download time. r=ochameau"

This reverts commit 2edbc123567161c4a379268a2714c39dadb3f847.