Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-1_2/rev/f3c069d448dc
Author: Ben Kelly <ben@wanderview.com>
Desc: Revert "Merge pull request #12947 from davidflanagan/bug884752-v1.2"

This reverts commit 8cbe9e4fe267f010bfa1e6a96837b600492d020c, reversing
changes made to 22b95ba3a4df0c2e69ac19a7300cb9d43085a860.
No bug, Automated blocklist update from host slice - a=blocklist-update