Make test run on Windows

Author: Porges

src/agent/coverage/examples/coverage.rs

@@ -174,7 +174,12 @@ mod test {
 
     #[test]
     fn can_run_coverage() {
+        #[cfg(target_os = "linux")]
         let cmd = command(&["ls".to_string()], None);
+
+        #[cfg(target_os = "windows")]
+        let cmd = command(&["dir.exe".to_string()], None);
+
         let recorded = CoverageRecorder::new(cmd)
             .timeout(Duration::from_secs(5))
             .record()