Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/94fca24c87ab
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #15157 from acperez/bug-957966

Bug 957966 - Single variant browser bookmarks are not loaded. r=benfrancis

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https://hg.mozilla.org/integration/gaia-central/rev/934d7e47cbd8
Author: Albert <acperez@tid.es>
Desc: Bug 957966 - Single variant browser bookmarks are not loaded. r=benfrancis