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

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https://hg.mozilla.org/integration/gaia-1_4/rev/4fbf40af8b08
Author: KWierso <kwierso@gmail.com>
Desc: Revert "Merge pull request #21665 from EragonJ/bug-1035823" for Gu test
failures on TBPL

This reverts commit ce631d7ada1845ef7ed925a506eb91cda6f09d24.
Bumping manifests a=b2g-bump