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

========

https://hg.mozilla.org/integration/gaia-1_3/rev/134b345a10ae
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #20828 from jrburke/bug1025727-email-cronsync-failsafe"

This reverts commit e5f7bbd6b8ee0b0014d2fef73a4ef59b620acaed.
Bumping manifests a=b2g-bump