audio/qsynth: Update to 0.4.4

[ultima]

Summary

• Updated to 0.4.4
• Removed QT4 option, obsoleted
• Added XUNIQUE option, to match configure
• Moved patch to post-patch target

PR\: 221456
Submitted by\: Yuri Victorovich (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

portlint:
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: new ports should not be maintained by [e-mail].
0 fatal errors and 2 warnings found.

poudriere:
103i386
103amd64
110i386
110amd64
12i386
12amd64

[matthew]