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

diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
index 04c56ac..b053a0c 100644
--- a/coreutils/dos2unix.c
+++ b/coreutils/dos2unix.c
@@ -12,7 +12,7 @@
  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */
 
-#include "busybox.h"
+#include "libbb.h"
 
 enum ConvType {
 	CT_UNIX2DOS = 1,