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

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https://hg.mozilla.org/integration/gaia-central/rev/cb08dfcbc56f
Author: Dale Harvey <dale@arandomurl.com>
Desc: Revert "Bug 1063685 - Fix lookup for browser windows. r=alive"

This reverts commit a0fa29db8e9e15afe3b1787bf494caa86a033f10.
Bumping manifests a=b2g-bump