Re: firefox -> 63.0 WIP diff

[coypu%sdf.org@localhost]

I figured out the rust bindgen problem.

#undef uintptr_t in the same file gets it to know it's usize.

fly@planets ~> cat test-right.h
#include <stdint.h>
#undef uintptr_t
extern uintptr_t should_be_usize;

fly@planets ~> ~/.cargo/bin/bindgen test-right.h
...
extern "C" {
    #[link_name = "\u{1}should_be_usize"]
    pub static mut should_be_usize: usize;
}

fly@planets ~> cat test-wrong.h
#include <stdint.h>
extern uintptr_t should_be_usize;


fly@planets ~> ~/.cargo/bin/bindgen test-wrong.h
..
pub type __uintptr_t = ::std::os::raw::c_ulong;
..
extern "C" {
    #[link_name = "\u{1}should_be_usize"]
    pub static mut should_be_usize: __uintptr_t;
}