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

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https://hg.mozilla.org/integration/gaia-central/rev/cd4744c3a390
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 986206 - Report filenames on test failures"

This reverts commit f54d933c592c229c74c7ea5a9582c17a931d75ae.
Bumping manifests a=b2g-bump