client: Use pcap_stats and export them as statistics

Attempt to write code that detects the wrap and is doing the
right thing when it happens.

Change-Id: I501ebc49d3e86b0605ec1fbe2f62aee3f362aa36
diff --git a/src/osmo_client_main.c b/src/osmo_client_main.c
index 0b53939..f5ba41a 100644
--- a/src/osmo_client_main.c
+++ b/src/osmo_client_main.c
@@ -62,6 +62,9 @@
 	[CLIENT_CTR_QERR]		= { "client.queue_err",		"Can not queue data    " },
 	[CLIENT_CTR_PERR]		= { "client.pcap_err",		"libpcap error         " },
 	[CLIENT_CTR_WERR]		= { "client.write_err",		"Write error           " },
+	[CLIENT_CTR_P_RECV]		= { "pcap.recv",		"PCAP received packets " },
+	[CLIENT_CTR_P_DROP]		= { "pcap.drop",		"PCAP dropped packets  " },
+	[CLIENT_CTR_P_IFDROP]		= { "pcap.ifdrop",		"iface dropped packets " },
 };
 
 static const struct rate_ctr_group_desc pcap_client_ctr_group_desc = {