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

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https://hg.mozilla.org/integration/gaia-central/rev/3c08d0f867b5
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Revert "Merge pull request #15996 from dmarcos/bug958200"

This reverts commit e1c8b80d893550b8cadf6ea77ea5471b6fef03e1, reversing
changes made to 60b7367e34ae791140cdfeeca0de113ca94a887d.
Bumping manifests a=b2g-bump