$NetBSD: patch-configure,v 1.1 2017/05/16 21:54:21 snj Exp $

this test for the system libtomcrypt needs -ltommath.

--- configure.orig	2017-04-25 21:47:13.570580493 -0700
+++ configure	2017-04-25 21:47:30.336185297 -0700
@@ -5963,7 +5963,7 @@ if ${ac_cv_lib_tomcrypt_register_cipher+
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-ltomcrypt  $LIBS"
+LIBS="-ltomcrypt -ltommath $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */