debian: fix web and VCS links, tweak osmo-msc.install

Change-Id: I3fffa73722c5437c969d25294e0ff86de5385087
diff --git a/debian/osmo-msc.install b/debian/osmo-msc.install
index 2c733e0..145d25d 100644
--- a/debian/osmo-msc.install
+++ b/debian/osmo-msc.install
@@ -1,2 +1,2 @@
-usr/bin
+usr/bin/osmo-msc
 usr/share/doc/openbsc/examples/osmo-msc/osmo-msc.cfg