debian: Update the rules to work from the toplevel directory
diff --git a/debian/osmocom-nitb.examples b/debian/osmocom-nitb.examples
index 2d410e7..c098d5c 100644
--- a/debian/osmocom-nitb.examples
+++ b/debian/osmocom-nitb.examples
@@ -1 +1 @@
-doc/examples/osmo-nitb
+openbsc/doc/examples/osmo-nitb