[configs/releng] Add systemd to live-enviroment

To test it, just boot with init=/bin/systemd
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

configs/releng/packages.i686

@@ -41,6 +41,7 @@ rp-pppoe
 rsync
 smartmontools
 speedtouch
+systemd
 tcpdump
 vpnc
 wireless_tools

configs/releng/packages.x86_64

@@ -42,6 +42,7 @@ rp-pppoe
 rsync
 smartmontools
 speedtouch
+systemd
 tcpdump
 vpnc
 wireless_tools