Apple ld64 for Debian.
Also cctools-strip because that gets built anyway.

Virtually all of the work here was done by @tpoechtrager, I merely slapped a Makefile in front of everything.

See the Actions tab for continuous integration.
Automatically builds binaries and deb files for Debian/Ubuntu, though artifacts are only kept for 90 days.

Selected builds are uploaded to Releases, as well as to the checkra1n APT repo.