Install systemd services with autotools

Change-Id: Ia1a4fb62dee35737ece1f3501f352501eba2449e
diff --git a/debian/osmo-trx-lms.install b/debian/osmo-trx-lms.install
index dd9d407..b58c862 100644
--- a/debian/osmo-trx-lms.install
+++ b/debian/osmo-trx-lms.install
@@ -1,2 +1,3 @@
+lib/systemd/system/osmo-trx-lms.service
 /usr/bin/osmo-trx-lms
 /usr/share/doc/osmo-trx/examples/osmo-trx-lms/osmo-trx-limesdr.cfg /usr/share/doc/osmo-trx/examples/osmo-trx-lms/