Clean up more usb related files when MK_USB == no when dealing with

manpages, libraries, and binaries

share/examples/Makefile

@@ -18,7 +18,6 @@ LDIRS=	BSD_daemon \
 	ipfw \
 	jails \
 	kld \
-	libusb20 \
 	libvgl \
 	mdoc \
 	netgraph \
@@ -92,12 +91,6 @@ XFILES=	BSD_daemon/FreeBSD.pfa \
 	kld/syscall/module/syscall.c \
 	kld/syscall/test/Makefile \
 	kld/syscall/test/call.c \
-	libusb20/Makefile \
-	libusb20/README \
-	libusb20/util.c \
-	libusb20/util.h \
-	libusb20/bulk.c \
-	libusb20/control.c \
 	libvgl/Makefile \
 	libvgl/demo.c \
 	mdoc/POSIX-copyright \
@@ -213,6 +206,16 @@ XFILES+=	hast/ucarp.sh \
 		hast/vip-up.sh
 .endif
 
+.if ${MK_USB} != "no"
+LDIRS+=		libusb20
+XFILES+=	libusb20/Makefile \
+		libusb20/README \
+		libusb20/util.c \
+		libusb20/util.h \
+		libusb20/bulk.c \
+		libusb20/control.c
+.endif
+
 beforeinstall: ${SHARED} etc-examples
 .ORDER: ${SHARED} etc-examples