fixup

Author: gnzlbg

libc-test/build.rs

@@ -2111,7 +2111,7 @@ fn test_linux(target: &str) {
     }
 
     // sysctl system call is unsupported in x32 kernel:
-    if !x86_64_32 {
+    if !x32 {
         headers! { cfg:  "sys/sysctl.h"}
     }