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

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https://hg.mozilla.org/integration/gaia-central/rev/81fccac0038e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 986062 - Adding a test making sure we don't do any reflows while using the edge gestures."

This reverts commit 6d197b64cb24bcf5f935f4385df3af53980fa193.
Bumping manifests a=b2g-bump