Summary:
We will need it for intl.
I've put it to User instead of UserProfile to be easier accessible.
Test Plan:
Apply SQL patch.
Change sex to Male.
Change sex to Unknown.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Koolvin
Maniphest Tasks: T1139
Differential Revision: https://secure.phabricator.com/D2287
