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

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https://hg.mozilla.org/integration/gaia-2_0/rev/3be3bcdd335e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Revert "Bug 1027144 - Re-enable test_homescreen_move_app.py" for intermittent test failures"

This reverts commit a0807151b0b28feb59b323a30b1f74dc8801be32.
Bumping manifests a=b2g-bump