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

diff --git a/libbb/getopt32.c b/libbb/getopt32.c
index 382d28a..d4465f8 100644
--- a/libbb/getopt32.c
+++ b/libbb/getopt32.c
@@ -7,8 +7,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "libbb.h"
 #include <getopt.h>
+#include "libbb.h"
 
 /*      Documentation