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

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https://hg.mozilla.org/integration/gaia-central/rev/cc954e7fd65f
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Revert "Merge pull request #15454 from vingtetun/bug959425"

This reverts commit a9b0aca976cd9fe4c44546a9f9c1eaee6b25f59d, reversing
changes made to 73a7e0c15969a058964e92fad1925efead38dcfc.
Bumping manifests a=b2g-bump