rust/chg/build.rs

upgrade: add an explicite --filelogs arguments

This make it possible to select no revlog for upgrade, which is useful for some
upgrade target or in some specific cases (eg: persistent-nodemap or share-safe
update).

Differential Revision: https://phab.mercurial-scm.org/D9468

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