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

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https://hg.mozilla.org/integration/gaia-central/rev/59304cc59d84
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13030 from teodosia/fix-mock-mail

Bug 929429 - The email address is not working properly in mock_contact.p.y

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https://hg.mozilla.org/integration/gaia-central/rev/1c6678adb9bd
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 929429 - The email address is not working properly in mock_contact.py