vm: minor fixes for Fedora 15

1. create /var/run/qubes as /var/run is now on tmpfs
2. if system-d is present - use it to disable NetworkManager

common/qubes_core

@@ -32,6 +32,8 @@ start()
 	# xenstore-read fails
 	INTERFACE=eth0 /usr/lib/qubes/setup_ip
 
+	mkdir -p /var/run/qubes
+
 	if [ -e /dev/xvdb ] ; then
 		mount /rw
 

rpm_spec/core-commonvm.spec

@@ -170,6 +170,8 @@ do
         chkconfig $srv off
 done
 
+[ -x /bin/systemctl ] && /bin/systemctl disable NetworkManager.service
+
 #echo "--> Enabling essential services..."
 chkconfig rsyslog on
 chkconfig haldaemon on