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

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https://hg.mozilla.org/integration/gaia-central/rev/d85704d12c2d
Author: Ben Kelly <ben@wanderview.com>
Desc: Revert "Merge pull request #16127 from changm/bug968478"

This reverts commit 4db70547e146f776461a9094de8829b5327b80b6, reversing
changes made to be36576f06390aa059c3da35dee76f7804e99b68.
Bumping manifests a=b2g-bump