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

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https://hg.mozilla.org/integration/gaia-central/rev/4cbae8f093eb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1025565 - Only render the necessary icons when dragging. r=kgrandon"

This reverts commit 1c2db4082e7c7c5bdf18beea429d4b57b617fb87.
Bumping manifests a=b2g-bump