MFH: r445062 r446536

• Fix LICENSE
• Add LICENSE_FILE
• Add links for gcc 8

Approved by: bdrewery@FreeBSD.org (maintainer, implicit)

Fix ccache-memcached-static to actually build statically.

This was broken by r440469.

Pointyhat to: bdrewery
Sponsored by: Dell EMC Isilon

Approved by: portmgr (implicit)