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

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https://hg.mozilla.org/integration/gaia-central/rev/bd2fed448530
Author: Doug Sherk <github@sherk.me>
Desc: Revert "Bug 1068104 - Wake up the screen when all calls are ended. r=etienne"

This reverts commit 9b6925dc50f057ea2728cb4a36e5df58eedf56a3.
Bumping manifests a=b2g-bump