Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/22cb357f0383
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11767 from qdot/909513-remove-old-tests

Bug 909513 - Remove old integration tests from system app

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https://hg.mozilla.org/integration/gaia-central/rev/a8df61008b8b
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 909513 - Remove old integration tests from system app