multimedia/makemkv: Use new linux-c7 -devel pkgs

This avoids fetching upstream distfiles just for OpenSSL headers. Bump
port revision because different headers are used.

Also drop perl5 dependency (not needed any more) and avoid little-known
AT&T style replacements in Makefile.

Approved by:		tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D36836