networkmanager: use systemd_unitdir variable

* maybe we should move systemd_unitdir definition outside systemd.bbclass
  because it's used in few more recipes which doesn't inherit systemd

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-connectivity/networkmanager/networkmanager_0.9.2.0.bb

@@ -4,7 +4,7 @@ SECTION = "net/misc"
 LICENSE = "GPLv2+"
 LIC_FILES_CHKSUM = "file://COPYING;md5=cbbffd568227ada506640fe950a4823b"
 
-PR = "r2"
+PR = "r3"
 
 DEPENDS = "systemd libnl dbus dbus-glib udev wireless-tools polkit gnutls util-linux ppp"
 inherit gnome gettext
@@ -70,7 +70,7 @@ FILES_${PN} += " \
 		${datadir}/polkit-1 \
 		${datadir}/dbus-1 \
 		${base_libdir}/udev/* \
-        ${base_libdir}/systemd \
+        ${systemd_unitdir} \
 "
 
 RRECOMMENDS_${PN} += "iptables"