Add `#[link]` attributes to dll imports
Add `#[link]` attributes to dll imports

This avoids using jmp stubs when calling functions exported from a dll.

aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust