debian: Update the rules to work from the toplevel directory
diff --git a/debian/osmocom-bsc.examples b/debian/osmocom-bsc.examples
index 2eec6ba..a95f12b 100644
--- a/debian/osmocom-bsc.examples
+++ b/debian/osmocom-bsc.examples
@@ -1 +1 @@
-doc/examples/osmo-bsc_mgcp
+openbsc/doc/examples/osmo-bsc_mgcp