add more mgcp crxc error counters

Add counters for error conditions which I overlooked in
commit 1e174875bf72c3d7840fa98cfad8c410a542919e

Change-Id: Ia2004f8063f3a50b5d7a838ebe8a784a47fcc50d
Depends: If4f097c5e441914eaa24c7657813ebb3f9a49916
Related: OS#2660
diff --git a/include/osmocom/mgcp/mgcp.h b/include/osmocom/mgcp/mgcp.h
index f9f0ac7..b866f91 100644
--- a/include/osmocom/mgcp/mgcp.h
+++ b/include/osmocom/mgcp/mgcp.h
@@ -131,6 +131,10 @@
 	MGCP_CRCX_FAIL_NO_REMOTE_CONN_DESC,
 	MGCP_CRCX_FAIL_START_RTP,
 	MGCP_CRCX_FAIL_REJECTED_BY_POLICY,
+	MGCP_CRCX_FAIL_NO_OSMUX,
+	MGCP_CRCX_FAIL_INVALID_CONN_OPTIONS,
+	MGCP_CRCX_FAIL_CODEC_NEGOTIATION,
+	MGCP_CRCX_FAIL_BIND_PORT,
 };
 
 struct mgcp_trunk_config {