Change trailing prctl arguments to c_ulong

Author: saethlin

library/std/src/sys/unix/thread.rs

@@ -122,7 +122,13 @@ impl Thread {
         // pthread wrapper only appeared in glibc 2.12, so we use syscall
         // directly.
         unsafe {
-            libc::prctl(PR_SET_NAME, name.as_ptr(), 0, 0, 0);
+            libc::prctl(
+                PR_SET_NAME,
+                name.as_ptr(),
+                0 as libc::c_ulong,
+                0 as libc::c_ulong,
+                0 as libc::c_ulong,
+            );
         }
     }