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

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https://hg.mozilla.org/integration/gaia-central/rev/9f59b97cb7c9
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #24636 from lightsofapollo/taskcluster-again

Taskcluster again

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https://hg.mozilla.org/integration/gaia-central/rev/2571ee90c0f9
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1073082 - Taskcluster decision tasks r=kgrandon
Bumping manifests a=b2g-bump