* removing the `-mmacosx-version-min` flag makes the build work again
* also fix the path to the `file` command in the configure script
to fix the warning
```
./configure: line 7754: /usr/bin/file: No such file or directory
```
Semi-automatic update. These checks were performed:
- built on NixOS
- found 0.8.9.0 with grep in /nix/store/vbfn9xivgfy294g5216r6jcy78dg9rf3-libmodplug-0.8.9.0
- found 0.8.9.0 in filename of file in /nix/store/vbfn9xivgfy294g5216r6jcy78dg9rf3-libmodplug-0.8.9.0
cc "@raskin"