New review comment by abenson on void-packages repository

https://github.com/void-linux/void-packages/pull/43752#discussion_r1185566584

Comment:
 You shouldn't cross-build for `-musl`.  Create a `-musl` `masterdir` and build in it: `./xbps-src -m masterdir-musl binary-bootstrap x86_64-musl ; ./xbps-src -m masterdir-musl pkg CBQN`.