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

diff --git a/console-tools/clear.c b/console-tools/clear.c
index 8e34d6d..053293c 100644
--- a/console-tools/clear.c
+++ b/console-tools/clear.c
@@ -12,7 +12,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include "busybox.h"
+#include "libbb.h"
 
 
 int clear_main(int argc, char **argv);