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

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https://hg.mozilla.org/integration/gaia-central/rev/64f5792194f3
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Merge pull request #23425 from qdot/846200-fix-permissions

846200 fix permissions

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https://hg.mozilla.org/integration/gaia-central/rev/e2b510d329f8
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 846200 - Fix permissions names in test atoms
Bumping manifests a=b2g-bump