Install osmo-pcu.cfg to docdir/examples

Change-Id: I42938d9abd17575c2e0ce69cc20d44a131f26b6a
diff --git a/debian/osmo-pcu.install b/debian/osmo-pcu.install
index 1b82e96..9b7eac6 100644
--- a/debian/osmo-pcu.install
+++ b/debian/osmo-pcu.install
@@ -3,3 +3,4 @@
 usr/bin/osmo-pcu
 usr/include/osmocom/pcu/pcuif_proto.h
 usr/lib/*/pkgconfig/osmo-pcu.pc
+usr/share/doc/osmo-pcu/examples/osmo-pcu/osmo-pcu.cfg