add back in HIDDEN_JUMPTARGET() as pointed out by psm

libc/sysdeps/linux/hppa/clone.S

@@ -124,7 +124,7 @@ thread_start:
 	bl	$$dyncall,%r31
 	copy	%r31,%rp
 
-	bl	_exit,%rp
+	bl	HIDDEN_JUMPTARGET(_exit),%rp
 	copy	%ret0,%arg0
 
 	/* Die horribly.  */