Fix CI by ignoring rmx_state on Apple platforms

libc-test/build.rs

@@ -408,6 +408,9 @@ fn test_apple(target: &str) {
             ("ifreq", "ifr_ifru") => true,
             ("ifkpi", "ifk_data") => true,
             ("ifconf", "ifc_ifcu") => true,
+            // FIXME: this field has been incorporated into a resized `rmx_filler` array.
+            ("rt_metrics", "rmx_state") => true,
+            ("rt_metrics", "rmx_filler") => true,
             _ => false,
         }
     });

src/unix/bsd/apple/mod.rs

@@ -509,6 +509,8 @@ s! {
         pub rmx_rtt: u32,
         pub rmx_rttvar: u32,
         pub rmx_pksent: u32,
+        /// This field does not exist anymore, the u32 is now part of a resized
+        /// `rmx_filler` array.
         pub rmx_state: u32,
         pub rmx_filler: [u32; 3],
     }