temporary: some km binding of winapi

[woodgear]

This PR is aim to show what we done. You could find out how we use rust write driver in win_driver_example That is a example code picked from our private project,but enough to show how we do. in briefly cargo xbuild +custom alloc + custom target + km binding of winapi. but there still some drawbacks

1. Link lib from a inner crate 'win-kmd-native-lib' instead of linking it from windows DDK installation .
2. Use custom compiler target because rust has no offical windows kernel target
3. Some binding does not follow winapi style
4. Use MISS_TYPE_PTR to avoid adding some struct which just a pointer. but anyway, you could just use rust to write a windows driver in a simple way,

[ivellioscolin]

@retep998 Any plan on KM support?

[retep998]

I do plan on adding km support, however I don't have the time to dedicate to investigating it fully at the moment.

[ivellioscolin]

I do plan on adding km support, however I don't have the time to dedicate to investigating it fully at the moment.

Cool. Btw, are these FFI bindings genereated fully by rust-bindgen or other methods?

[rmccrystal]

I would love to see this as well. I am building a kernel-mode driver in Rust and I have to manually define all the functions I want to use. Having KM bindings in this crate or the windows crate would make things much easier, especially when dealing with structs.