games/quadra: fix build on 15-CURRENT

Link with -lutil to get ftime() which was moved there with recently.
This is harmless on older FreeBSD.

While we are at it, define LICENSE.

Approved by: portmgr (build fix blanket, infrastructure blanket)
MFH: 2024Q4

(cherry picked from commit f7b1e63b41d0c8b645c23e0d93c8ad644cbbba4b)