Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5e89703149a4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1010415 - Disable intermittent notification_resend_test.js | mozChromeNotifications: Sending one notification, remove from tray, resend
Bumping manifests a=b2g-bump