nuke: shorten help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

klibc-utils/minips.c

@@ -9,4 +9,4 @@
 //config:	help
 //config:	Alias to "ps".
 
-/* applet abd kbuild hooks are in ps.c */
+/* applet and kbuild hooks are in ps.c */

klibc-utils/nuke.c

@@ -16,7 +16,7 @@
 //usage:#define nuke_trivial_usage
 //usage:       "DIR..."
 //usage:#define nuke_full_usage "\n\n"
-//usage:       "Resursively remove DIRs"
+//usage:       "Remove DIRs"
 
 #include "libbb.h"