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

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https://hg.mozilla.org/integration/gaia-central/rev/9f7ea9db8ff2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17203 from KevinGrandon/bug_983663_contacts_unit_test_lint

Bug 983663 - [Contacts] JSHint fixes for contact unit tests

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https://hg.mozilla.org/integration/gaia-central/rev/2c99aceb1b7f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 983663 - [Contacts] JSHint fixes for contact unit tests r=arcturus
Bumping manifests a=b2g-bump