fix debian: fix erratic doc/examples install path

Change-Id: I8fc3d50b95649145e45ea6b56792ddbaf0548050
diff --git a/debian/osmo-msc.install b/debian/osmo-msc.install
index 145d25d..3e289b2 100644
--- a/debian/osmo-msc.install
+++ b/debian/osmo-msc.install
@@ -1,2 +1,2 @@
 usr/bin/osmo-msc
-usr/share/doc/openbsc/examples/osmo-msc/osmo-msc.cfg
+usr/share/doc/osmo-msc/examples/osmo-msc/osmo-msc.cfg