Convert all coreutils/* applets to "new style" applet definitions

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

coreutils/cksum.c

@@ -6,6 +6,15 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config CKSUM
+//config:	bool "cksum"
+//config:	default y
+//config:	help
+//config:	  cksum is used to calculate the CRC32 checksum of a file.
+
+//applet:IF_CKSUM(APPLET_NOEXEC(cksum, cksum, BB_DIR_USR_BIN, BB_SUID_DROP, cksum))
+
+//kbuild:lib-$(CONFIG_CKSUM) += cksum.o
 
 //usage:#define cksum_trivial_usage
 //usage:       "FILES..."