Update pamusb-agent

Switching to pam_usb.conf to match other pam module naming schemes.

tools/pamusb-agent

@@ -123,7 +123,7 @@ try:
 except getopt.GetoptError:
 	usage()
 
-options = {'configFile' : '/etc/pamusb.conf',
+options = {'configFile' : '/etc/security/pam_usb.conf',
 		'daemon' : False,
 		'check' : '/usr/bin/pamusb-check'}