audio/ardour5: Update to 5.9

[joneum]

Summary

• Update to 5.9

PR: 219396
Submitted by: Michael Beer (maintainer)
Approved by: xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

audio/ardour5 % portlint -AC
WARN: Makefile: Consider adding support for a NLS knob to conditionally disable gettext support.
WARN: Makefile: [49]: possible direct use of command "find" found. use ${FIND} instead.
WARN: Makefile: possible use of absolute pathname "/obj\.use".
WARN: Makefile: possible use of absolute pathname "/libsmf\.name".
WARN: Makefile: possible use of absolute pathname "/libsmf\.target".
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 6 warnings found.

poudriere testport:

10amd64
10i386
11amd64
11i386
12.0-CURRENT r318899 amd64
12.0-CURRENT r318400 i386