add aarch64 static cbc library for arm64 architecture

[knutster]

add aarch64 static cbc library for arm64 architectures. Verified on AWS Graviton 2 / 3 instances.

[CLAassistant]

All committers have signed the CLA.

[knutster]

Added build scripts for ARM linux

[JoOkuma]

Hey @knutster, which version of the compiled libraries did you use?
Were you able to compile this using the master branch of all of them?
I'm trying to compile myself for a Linux build, but I'm having some issues.

[tkralphs]

Looks like this was already done in #367 .

[JoOkuma]

Hi @tkralphs, but this was never released into pypi, https://pypi.org/project/mip/#history
It's only available on version 1.16rc0.

[tkralphs]

Yes, it has not been released yet, but it is on PyPi and easily pip installable. Making the release is a separate issue and that should be easy once the maintainers decide they want to do that. Regardless of the release, this PR is a duplicate of #367 as far as I can see so I just wanted to alert you to that.

[JoOkuma]

@tkralphs, I completely agree it's is easily installable, but it's an issue when using dependencies because often release candidates are ignored and not considered valid packages so it seems as arm macos version is unavailable.

Nonetheless, I recognize most of you maintain this package on your free time and I don't mean to be pushy, I just wanted to provide some insight on why they might have opened this PR.

[tkralphs]

@JoOkuma OK, sorry if I misinterpreted, I thought you were saying that this PR should remain open. Indeed, it would be better if there was a release on Pypi with the ARM64 binaries.