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

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https://hg.mozilla.org/integration/gaia-1_4/rev/9b9c70ed594c
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #20828 from jrburke/bug1025727-email-cronsync-failsafe"

This reverts commit e68f589db4de9355c3ab1896e6f70d63d7d82809.
Bumping manifests a=b2g-bump