build: fix detection of libpcap on Ubuntu 23.04

Beginning with version 1.10.2, pcap-config treats
unrecognized command-line options as an error.

Change-Id: Iba62d6d4586cf505c68032338048d04597baff96

tools/dump/wscript

@@ -2,8 +2,9 @@
 top = '../..'
 
 def configure(conf):
-    conf.check_cfg(package='libpcap', uselib_store='PCAP',
-                   path='pcap-config', args='--libs --cflags')
+    conf.check_cfg(msg='Checking for libpcap',
+                   path='pcap-config', args='--cflags --libs',
+                   package='', uselib_store='PCAP')
     conf.check_cxx(msg='Checking if struct tcphdr has member th_off ',
                    define_name='HAVE_BSD_TCPHDR', mandatory=False,
                    fragment='''#include <netinet/tcp.h>