msys2: use ls.exe instead of coreutils.exe for coreutils directory

tests/functional/meson.build

@@ -17,7 +17,12 @@ fs = import('fs')
 nix = find_program('nix')
 bash = find_program('bash', native : true)
 busybox = find_program('busybox', native : true, required : false)
-coreutils = find_program('coreutils', native : true)
+if host_machine.system() == 'windows'
+  # Because of the state of symlinks on Windows, coreutils.exe doesn't usually exist, but things like ls.exe will
+  coreutils = find_program('ls', native : true)
+else
+  coreutils = find_program('coreutils', native : true)
+endif
 dot = find_program('dot', native : true, required : false)
 
 nix_bin_dir = fs.parent(nix.full_path())