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

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https://hg.mozilla.org/integration/gaia-central/rev/c522a7ea5e5b
Author: gaye <gaye@mozilla.com>
Desc: Bug 1052941 - test-agent sinon fail r=julien
Bumping manifests a=b2g-bump