rust/chg/build.rs

rust-parsers: move parser bindings to their own file and Python module

This tidies up the Rust side while simplifying the Python side.

Differential Revision: https://phab.mercurial-scm.org/D6627

extern crate cc;

fn main() {
    cc::Build::new()
        .warnings(true)
        .file("src/sendfds.c")
        .file("src/sighandlers.c")
        .compile("procutil");
}