rust/chg/build.rs

py3: pass a bytestring into querydrev instead of a string that'll TypeError

This was a regression I introduced in c19d259fd6ad.  When the string gets to
the memoryview in _tokenize under py3 it'll die.

Differential Revision: https://phab.mercurial-scm.org/D6869

extern crate cc;

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