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

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https://hg.mozilla.org/integration/gaia-2_0/rev/225b20f240d5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Merge pull request #20819 from KevinGrandon/bug_1028351_vertical_manifest_localization"

This reverts commit dbadf13dc9df2fb6af33a9c22cc0affb31485dd2.
Bumping manifests a=b2g-bump