Fix People mobile menu URLs

Summary: The mobile menu on people profiles has the incorrect order in the URLs and thus, 404s.

Test Plan: Went to a profile on a mobile display, click on feed and calendar links, got to correct place.

Reviewers: epriestley, btrahan

Reviewed By: btrahan

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11847