Fix test on 1.24.0

Author: asomers

src/sys/socket/mod.rs

@@ -511,7 +511,8 @@ pub enum ControlMessage<'a> {
     /// let time1 = SystemTime::now();
     /// // the packet's received timestamp should lie in-between the two system
     /// // times, unless the system clock was adjusted in the meantime.
-    /// let rduration = Duration::from_micros(rtime.num_microseconds() as u64);
+    /// let rduration = Duration::new(rtime.tv_sec() as u64,
+    ///                               rtime.tv_usec() as u32 * 1000);
     /// assert!(time0.duration_since(UNIX_EPOCH).unwrap() <= rduration);
     /// assert!(rduration <= time1.duration_since(UNIX_EPOCH).unwrap());
     /// // Close socket