This allows cross compiling from aarch64-darwin to x86_64-linux.
It is required for building Go binaries on macos that target Linux and have CGO enabled.
Cryptsetup and libvirt are new.
OpenSSL was moved with the rest.
The dynamic libaries cryptsetup and libvirt also ship a file called closure.tar,
that contains the transitive closure for all of their dependencies.
This tar file can be used as a container image layer or added to a bootable OS image
to provide the runtime dependencies required for dynamic linking.
Additionally, they ship a `rpath` file. This can be used together with patchelf to
fix the RPATH of binaries produced by Bazel.
