R1:fc09bcf0a32a

Move qsprintf() test cases from libphutil to Phabricator

Summary: Also move the other tests up so they'll trigger when this stuff is touched.

Test Plan: liberate

Reviewers: nh, btrahan, vrana

Reviewed By: nh

CC: aran

Maniphest Tasks: T1283

Differential Revision: https://secure.phabricator.com/D3074