Improvements to MacOS builds

[tresf]

Note before merging: This PR contains commits from #115, but they can be refactored out once that branch is merged into develop.

Relevant commits:

• 1e2be9a - Add darwin-aarch64 to dockcross
• fba8f73 - Bump JNA to 5.8.0 (allows separate .dylib files for separate architectures on MacOS)
• 88c66e9 - Switch to JNA 5.8.0 darwin suffix
• 88c66e9 - Gracefully handle missing folders, files
• 408420c - Remove problematic calls to make clean (Closes build-hidapi.sh: Remove calls to "make clean" #122)
• e40bdfe - Add hints for SDKROOT, MACOSX_DEPLOYMENT_TARGET (Closes Building for MacOS should encourage setting an SDK version #120)

Related #108

[DaPutzy]

Hi! I opened this issue a couple days ago and created a little patch to add the "non-exclusive device open mode" for mac os.

I feel like this would be a great addition to this PR!

It does require libhidapi > 0.12.0 though, and I don't think that is the version currently used in this PR.
I could not figure out where the version is actually coming from though?

[tresf]

Hi! I opened this issue a couple days ago and created a little patch to add the "non-exclusive device open mode" for mac os.

Thanks! Can you please open a separate PR for this patch?

I feel like this would be a great addition to this PR!

Since it modifies the default behavior I think it should be separate for better tracking, but it definitely improves the quality of life for MacOS users.

I haven't read the PR patch yet, but many applications will want to maintain exclusive access, so I would recommend (if not already) that the PR has an API toggle for this behavior.

It does require libhidapi > 0.12.0 though, and I don't think that is the version currently used in this PR. I could not figure out where the version is actually coming from though?

AFAIR, the build system always uses the latest version from upstream.

[DaPutzy]

I implemented a toggle and the default behaviour is the same as before :)

I build this on top of your PR but i just noticed you only changed the build anyway so there should be no issue creating a separate PR.

[DaPutzy]

Created a new PR as discussed 👍