Update hostapd/wpa_supplicant to 2.8 to fix multiple vulnerabilities.
Approved by: so
Security: FreeBSD-SA-19:03.wpa
Security: CVE-2019-9494
Security: CVE-2019-9495
Security: CVE-2019-9496
Security: CVE-2019-9497
Security: CVE-2019-9498
Security: CVE-2019-9499
Security: CVE-2019-11555