Don't compile ggatec/ggated in NO_LIBPTHREAD case.

Reported by:	Andrea Campi <andrea+freebsd_cvs_all@webcom.it>
Approved by:	re (scottl)

Makefile

@@ -1,5 +1,12 @@
 # $FreeBSD$
 
-SUBDIR=	ggatel ggatec ggated
+SUBDIR=	${_ggatec} \
+	${_ggated} \
+	ggatel
+
+.if !defined(NO_LIBPTHREAD)
+_ggatec=	ggatec
+_ggated=	ggated
+.endif
 
 .include <bsd.subdir.mk>