audio/supercollider: Update to 3.11.0
- Introduce additional default option AVAHI to make the use of the Avahi libraries optional.
- Remove one patch and the whole patching via "post-patch" - both is no longer needed.
- While I'm here: Prepare the port for Qt 5.15.0
Changelog:
https://github.com/supercollider/supercollider/releases/tag/Version-3.11.0
PR: 246320
Submitted by: shamaz.mazum@gmail.com
Approved by: Neal Nelson <ports@nicandneal.net> (maintainer)
MFH: 2020Q2 (blanket: unbreak broken port)