lock: Include bug.h instead of big util.h

This makes it suitable to use in PIE code.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/lock.h

@@ -9,7 +9,7 @@
 #include "asm/types.h"
 #include "asm/atomic.h"
 #include "syscall.h"
-#include "util.h"
+#include "bug.h"
 
 typedef struct {
 	atomic_t raw;