Specifying the #[link] to ntdll on each symbol individually results in spam to the linker

[This is a bug in Rust](https://github.com/rust-lang/rust/issues/38460), but I'm opening an issue here regardless.

![screenshot of linker command line which is ntdll.lib repeated a million times](https://user-images.githubusercontent.com/666308/83129660-22af7f80-a0ab-11ea-9236-8df8921161b5.png)
