lirc: fixed to only install a udev rules file when udev is installed

multimedia/lirc/lirc.conf

@@ -2,6 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../lirc/lirc.conf
+# Copyright (C) 2011 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -19,7 +20,9 @@ lirc_install ()
 {
 	mkdir -p $datadir/lirc
 	cp -av contrib/{irman2lirc,lircd.conf,lircmd.conf,lircrc,lircs} $datadir/lirc
-	[ -d $sysconfdir/udev/rules.d ] && cp -av contrib/lirc.rules $root/etc/udev/rules.d
+	if pkginstalled -f udev; then
+		cp -av contrib/lirc.rules $( pkgprefix libdir udev )/udev/rules.d/
+	fi
 }
 
 hook_add postmake 5 "lirc_install"