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

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https://hg.mozilla.org/integration/gaia-central/rev/63ea62ea5a2e
Author: Dave Hunt <dave.hunt@gmail.com>
Desc: Bug 1106571 - Support new storage structure for IndexedDB when populating reference workloads. r=jvarga
Bumping manifests a=b2g-bump