automation: use LSB_RELEASE instead of DEBIAN_VERSION This should be more robust since I believe the minor version can change mid release. Differential Revision: https://phab.mercurial-scm.org/D6910

extern crate cc;

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