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

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https://hg.mozilla.org/integration/gaia-central/rev/77d695e891c4
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11732 from qdot/close-tests

Bug 892528 - Integration tests for closing notifications

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https://hg.mozilla.org/integration/gaia-central/rev/00deb55e245d
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 892528 - Integration tests for closing notification