created an eap-tnc method hull

src/libcharon/Makefile.am

@@ -332,6 +332,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_EAP_TNC
+  SUBDIRS += plugins/eap_tnc
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/eap_tnc/libstrongswan-eap-tnc.la
+endif
+endif
+
 if USE_TLS
 if MONOLITHIC
   # otherwise this library is linked to eap_tls