pmjll - build polymake binaries with JLLPrefixes.jl

This uses https://github.com/JuliaBinaryWrappers/polymake_jll.jl and its dependencies to build a self-contained polymake binary tarball, using JLLPrefixes.jl.

./create_tarball.sh [-a arch] [-j julia] [-p prefix] [-o os]

• arch: x86_64 or aarch64.
• os: linux or macos.
• julia: should point to a julia binary, this is only needed for building the tarball.
• prefix: temporary installation prefix (default: /tmp/pmjll).

Other architectures or operating systems might work as well if supported by polymake_jll.