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

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https://hg.mozilla.org/integration/gaia-central/rev/0fa8e64e132a
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #23919 from jrburke/bug1063311-email-activity-config

Bug 1063311 - [Contacts] Warning page does not work when tap email in user contact r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/ef1ac39a3bb6
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1063311 - [Contacts] Warning page does not work when tap email in user contact
Basically reverts f695792496326679702a0b2f48a9c384fd47473a
Bumping manifests a=b2g-bump