- remove SSL certificate from winebuild.sh (was causing too many
problems, not worth the effort)
- set pytools version to 2020.2 in winebuild.sh, as that's the last one
to support python2
- fixes#1658
- I want to use a https cache for build, that requires to add a new root CA for
pip, and I can't find a way to do that cleanly without modifying the
winebuild.sh script
- update and clean up and make sure it works
- it builds the binary but I haven't tried to run the binary
- it probably still missing some fine tuning, OpenCL probably doesn't work
