Makefile.groups: fixed another type of double parenthesis

- reported by Vicente Hernando

Makefile.groups

@@ -171,7 +171,7 @@ mod_list_all=$(sort $(mod_list_basic) $(mod_list_extra) \
 			   $(mod_list_cassandra) $(mod_list_oracle) \
 			   $(mod_list_iptrtpproxy) $(mod_list_mi_xmlrpc) \
 			   $(mod_list_outbound) $(mod_list_osp) \
-			   $(mod_list_java) $(mod_list_stun)) \
+			   $(mod_list_java) $(mod_list_stun) \
 			   $(mod_list_dnssec)