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

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https://hg.mozilla.org/integration/gaia-central/rev/b33e2b02f5f6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1060218 - [System] Minor marionette test cleanup r=kgrandon"

This reverts commit cb6f1877572b5aae386cf95fa159f98f715acf0d.
Bumping manifests a=b2g-bump