Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/85a9e577f4b3
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Revert "Bug 939062 - Improve wait in test_add_contact_to_favorites.py"

This reverts commit 4b1aeae83c1b331716053304c0d0a9c48d323d4d.