CMU-BIN fails to build on OSX

Roswell v23.10.14.114

```
  Extracting archive:/Users/runner/.roswell/archives/cmucl-21e-x86-darwin.tar.bz2
  + ros use cmu-bin
  /Users/runner/.roswell/impls/x86-64/darwin/cmu-bin/21e/bin/lisp is not executable. Missing 32bit glibc?
  Error: unable to use 'cmu-bin'
```