Function rustc_ap_rustc_fs_util::rename_or_copy_remove

pub fn rename_or_copy_remove<P: AsRef<Path>, Q: AsRef<Path>>(
    p: P, 
    q: Q
) -> Result<RenameOrCopyRemove>

Rename p into q, preferring to use rename if possible. If rename fails (rename may fail for reasons such as crossing filesystem), fallback to copy & remove