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

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https://hg.mozilla.org/integration/gaia-central/rev/484c14da7a74
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #25135 from zacc/bug_1082543

Bug 1082543 - Update makeReferenceWorkload.sh to push to new indexeddb f...

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https://hg.mozilla.org/integration/gaia-central/rev/aba1f7b277f0
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1082543 - Update makeReferenceWorkload.sh to push to new indexeddb file location r=jhylands
Bumping manifests a=b2g-bump