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

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https://hg.mozilla.org/integration/gaia-central/rev/0763a823613b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1092195 - Investigate failure in test_cost_control_ftu.py"

This reverts commit 07f5ea2d845d6d17c05c388090b77528ac87ddb4.
Bumping manifests a=b2g-bump