New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/24765#issuecomment-855239939

Comment:
- leave comment on make_check that it is because ASDF/USER::PROVE is not installed
- cross compilation fail due to iolib/syscalls setting compiler flags wrong, please enable again with explaination rather than link
- set make_build_target=all instead of overwriting do_build
- would be best if uploaded tarball was to versioned, but as is can be accepted too