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

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https://hg.mozilla.org/integration/gaia-central/rev/64043480018e
Author: KWierso <kwierso@gmail.com>
Desc: Revert "Merge pull request #17494 from gasolin/sheriff971554" for gaia-unit failures

This reverts commit c377f41d017d4b099e92fd7ecf67d9cd1cee1292, reversing
changes made to 3286e2a0cbcac52e38c0494ab614bac23cdc229f.
Bumping manifests a=b2g-bump