Support ARM64 on Linux

[paambaati]

I noticed this module always reports x64 on 64-bit systems, but does not make the same kind of additional checks as Darwin for Linux.

Linux does run on other architectures; one of my use-cases is my code is being run on a self-hosted GHA runner, and it is running Linux on ARM64.

Would you be open to a PR that adds additional checks for Linux?