Build universal shared libraries for macOS [2 XMR]

[woodser]

Currently, the .dylib shared libraries built on macOS are platform-dependent, so they need generated for both x86_64 and ARM64.

This issue requests building the libmonero-cpp.dylib and libmonero-java.dylib as universal shared libraries which work on either architecture.

See the build instructions to build the dylibs.

[github-actions[bot]]

There is a bounty on this issue. The amount is in the title. The reward will be awarded to the first person or group of people who resolve this issue.

If you are starting to work on this bounty, please write a comment so that we can assign the issue to you. We expect contributors to provide a PR in a reasonable timeframe or, in case of an extensive work, updates on their progress. We will unassign the issue if we feel the assignee is not responsive or has abandoned the task.

Read the full conditions and details of the bounty system.

[NorrinRadd]

Hi @woodser, if this bounty is still open, please assign it to me. Thanks.

[woodser]

I've assigned to you. Thanks @NorrinRadd