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

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https://hg.mozilla.org/integration/gaia-central/rev/4932dd6a72a0
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #24793 from lightsofapollo/bug-1078019

Switch integration tests to use mocha-tbpl-reporter

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https://hg.mozilla.org/integration/gaia-central/rev/741522047be1
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1078019 - Use tbpl reporter in js based tests
Bumping manifests a=b2g-bump