better logging for cross

src/deb/cross.rs

@@ -149,6 +149,7 @@ pub fn setup_environment(
     env: &mut HashMap<String, String>,
     arch: &str,
 ) -> Result<(), Box<dyn Error>> {
+    log::debug!("Running 'dpkg-architecture -a{}'", arch);
     let dpkg_architecture = String::from_utf8(
         context::current()
             .command("dpkg-architecture")
@@ -156,6 +157,7 @@ pub fn setup_environment(
             .output()?
             .stdout,
     )?;
+    log::debug!("dpkg-architecture done");
     let env_var_regex = regex::Regex::new(r"(?<key>.*)=(?<value>.*)").unwrap();
     for l in dpkg_architecture.lines() {
         let capture = env_var_regex.captures(l).unwrap();