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

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https://hg.mozilla.org/integration/gaia-central/rev/b92b1fecfd69
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11700 from jugglinmike/908325-test-script-typo

Bug 908325 - Integration test script references paths incorrectly

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https://hg.mozilla.org/integration/gaia-central/rev/8f19ab1c94bd
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 908325 - Integration test script references paths incorrectly

r=lightsofapollo