Spotify architecture support

[kevinmcox]

Adds architecture variables since Spotify does not provide a Universal application.

[kevinmcox]

Output of a run:

Spotify.txt

[homebysix]

For future changes like this, I would recommend setting the default value to the Intel flavor (in this case an empty string) instead of to the Apple Silicon flavor. This way administrators who don't update their overrides immediately will still be distributing the same architecture as before, while the new architecture will be available to those who choose to use it.

[kevinmcox]

@homebysix that makes sense. I guess I was thinking at some point we need to start assuming ARM as the default, so why not now?