Small usr.bin/Makefile patch to remove a reference to wtmpcvt

[Jos Backus]

This directory no longer exists so the reference should be removed as it
breaks the build.

--- Makefile.orig 2012-01-16 12:24:28.000000000 -0800
+++ Makefile 2012-01-16 12:24:36.000000000 -0800
@@ -339,7 +339,6 @@
SUBDIR+= last
SUBDIR+= users
SUBDIR+= who
-SUBDIR+= wtmpcvt
.endif

.include <bsd.arch.inc.mk>


-- 
Jos Backus
jos at catnook.com