Install sample cfg file to /etc/osmocom

Change-Id: I080ae6a4c4f92dd8df055efd25e308f8a3377d34
diff --git a/debian/osmocom-bsc-sccplite.install b/debian/osmocom-bsc-sccplite.install
index 67c50cb..872333e 100644
--- a/debian/osmocom-bsc-sccplite.install
+++ b/debian/osmocom-bsc-sccplite.install
@@ -1,2 +1,3 @@
+/etc/osmocom/osmo-bsc-sccplite.cfg
 /lib/systemd/system/osmo-bsc-sccplite.service
 /usr/bin/osmo-bsc-sccplite