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

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https://hg.mozilla.org/integration/gaia-central/rev/cb4d7ca87785
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #22207 from svic/Bug_1043856"

This reverts commit 6a3e55ac1391a78ee77f247d69bb3f71da43ece9, reversing
changes made to efd6f69414f80e587c59e6bd2d381e30dd288d2e.
Bumping manifests a=b2g-bump