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

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https://hg.mozilla.org/integration/gaia-central/rev/7f3c076db8bb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17119 from KevinGrandon/bug_982571_contacts_mock_jshint

Bug 982571 - [Contacts] JSHint fixes for contact unit test mocks r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/8dc5f248cd53
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 982571 - [Contacts] JSHint fixes for contact unit test mocks r=arcturus
Bumping manifests a=b2g-bump