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

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

coreutils/realpath.c

@@ -1,7 +1,4 @@
 /* vi: set sw=4 ts=4: */
-
-/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
-
 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  *
  * Now does proper error checking on output and returns a failure exit code
@@ -9,6 +6,18 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config REALPATH
+//config:	bool "realpath"
+//config:	default y
+//config:	help
+//config:	  Return the canonicalized absolute pathname.
+//config:	  This isn't provided by GNU shellutils, but where else does it belong.
+
+//applet:IF_REALPATH(APPLET(realpath, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_REALPATH) += realpath.o
+
+/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
 
 //usage:#define realpath_trivial_usage
 //usage:       "FILE..."