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

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

coreutils/usleep.c

@@ -6,6 +6,15 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config USLEEP
+//config:	bool "usleep"
+//config:	default y
+//config:	help
+//config:	  usleep is used to pause for a specified number of microseconds.
+
+//applet:IF_USLEEP(APPLET_NOFORK(usleep, usleep, BB_DIR_BIN, BB_SUID_DROP, usleep))
+
+//kbuild:lib-$(CONFIG_USLEEP) += usleep.o
 
 /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */