Scheme for Max 0.3 - Apple Universal Binary update

This is a drop in replacement for the external compiled as a Universal Binary. It should enable you to run on Apple Silicon by replacing the s4m.mxo from the 0.3 release with this one. This is not a full release, this is a replacement .mxo only - if you have not yet installed s4m, install the 0.3 release. You only need this file to update the 0.3 release for Apple Silicon.

I will make a proper package with this binary once I have confirmation it's working from some folks. Please let me know in the associated discussion if it works for you (on either intel or M1) or file issues if not!