rust/chg/build.rs

match: normalize `cwd` early

By having cwd in absolute form, we won't have to adjust it when
passing it to subrepo matchers. This will matter for a coming patch.

Differential Revision: https://phab.mercurial-scm.org/D7650

extern crate cc;

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