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

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https://hg.mozilla.org/integration/gaia-central/rev/5ea63273648d
Author: Zac <zcampbell@mozilla.com>
Desc: Revert "Bug 1033975 - Resolve Python suite crash handling"

This reverts commit 9bfd3827d383e525a272c1825da0e1c1afcb626e.
Bumping manifests a=b2g-bump