add support for arm64 builds

The CMake auto-compile setup should be updated to support arm64 platform.

This request came via Klaus Filip:

https://twitter.com/klaus_filip/status/1506244704471502858

https://cycling74.com/forums/help-compiling-c-source-code-for-windows-64bit-version-of-vpab-by-ville-pulkki/replies/1#reply-6241bfd60830332c3e0310c7
