Fix build in Windows/msys

[pauloscustodio]

msys2 support of symlinks is broken

[shawnlaffan]

It might be better to implement has_symlinks from the Path::Tiny tests. It handles the case where $Config{d_symlink} is defined but symlinks cannot be created by the user running the tests.

https://github.com/dagolden/Path-Tiny/blob/7a84e3c6952e8d27e3963c92e6087aac36534451/t/lib/TestUtils.pm#L26-L41