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

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https://hg.mozilla.org/integration/gaia-1_2/rev/e012947b789a
Author: John Ford <john@johnford.info>
Desc: Revert "Merge pull request #12234 from EragonJ/bug-914317"

This reverts commit bda5c4a902793934467b689a118a2c68f745706e, reversing
changes made to bc85e07011c2c40986693657fa7647ee5c9f8eea.