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

[zirias]

Summary

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.

[tcberner]

multimedia/makemkv/Makefile

35–38

^ I would add a line break after expat, so that the "build&run" depends are clearly separted:

USE_LINUX=base expat \
                    devools:build [...]

[zirias]

Ok then, would look like this...

[tcberner]