usage.c: remove reference to busybox.h
*: s/include "busybox.h"/include "libbb.h"

diff --git a/util-linux/setarch.c b/util-linux/setarch.c
index a7a45ec..f6433d6 100644
--- a/util-linux/setarch.c
+++ b/util-linux/setarch.c
@@ -14,7 +14,7 @@
 #include <stdio.h>
 #include <sys/personality.h>
 
-#include "busybox.h"
+#include "libbb.h"
 
 int setarch_main(int ATTRIBUTE_UNUSED argc, char **argv);
 int setarch_main(int ATTRIBUTE_UNUSED argc, char **argv)