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

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https://hg.mozilla.org/integration/gaia-central/rev/697ad1101941
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Revert "Merge pull request #12062 from comoyo/new_ime_webidl2"

This reverts commit 680af02b60247df4afb823680d244b7e503ad25a, reversing
changes made to 64ba02f7bbf70a1877ba9dad6889a17cd25b1d35.