move help text from include/usage.src.h to console-tools/*.c

Signed-off-by: Pere Orga <gotrunks@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/console-tools/clear.c b/console-tools/clear.c
index dcb9bfb..ac22b78 100644
--- a/console-tools/clear.c
+++ b/console-tools/clear.c
@@ -6,6 +6,12 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+
+//usage:#define clear_trivial_usage
+//usage:       ""
+//usage:#define clear_full_usage "\n\n"
+//usage:       "Clear screen"
+
 #include "libbb.h"
 
 int clear_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;