contrib: Add osmo-msc service file

Change-Id: Ifdaf4107167c84af8a616f4ee792d5a34495564b
diff --git a/contrib/systemd/osmo-msc.service b/contrib/systemd/osmo-msc.service
new file mode 100644
index 0000000..2c81eba
--- /dev/null
+++ b/contrib/systemd/osmo-msc.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Osmocom Mobile Switching Center (MSC)
+Wants=osmo-hlr
+After=osmo-hlr
+
+[Service]
+Type=simple
+Restart=always
+ExecStart=/usr/bin/osmo-msc -c /etc/osmocom/osmo-msc.cfg
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target