security/wpa_supplicant: Allow users of FreeBSD 9 with libre- or openssl
from ports to build the port.

FreeBSD 9 is EOL in less than a week. Now those stragglers still running
9.3 can get online to update in the next few days.

Approved by: AMDmi3 (mentor) swills (mentor)
Differential Revision: https://reviews.freebsd.org/D8875