Build JLL

[nickrobinson251]

to test this out locally, from the base of the ObjectStore.jl repo:

# build binary and `rust_store_jll.jl` wrapper package
# you might want to just set `platforms = [Platform("aarch64", "macos")]` first (or whatever your platform is)
# takes ~15 mins
$ julia --project=deps build_tarballs.jl --debug --verbose --deploy=local

# add dependency on `object_store_ffi_jll.jl`
$ julia --project -e 'using Pkg; Pkg.develop(path=expanduser("~/.julia/dev/object_store_ffi_jll"))'

# now the ObjectStore.jl tests should pass
$ julia --project -e 'using Pkg; Pkg.test()'