Test sighandler_t on FreeBSD

Author: gnzlbg

libc-test/build.rs

@@ -1677,16 +1677,6 @@ fn test_freebsd(target: &str) {
         }
     });
 
-    cfg.skip_type(move |ty| {
-        match ty {
-            // sighandler_t is crazy across platforms
-            // FIXME: still required?
-            "sighandler_t" => true,
-
-            _ => false,
-        }
-    });
-
     cfg.skip_struct(move |ty| {
         match ty {
             // This is actually a union, not a struct