Define SYSMALLOC on NetBSD so that standalone-tcsh links.

Index: distinfo
===================================================================
RCS file: /cvsroot/pkgsrc/shells/tcsh/distinfo,v
retrieving revision 1.44
diff -p -u -r1.44 distinfo
--- distinfo	8 Dec 2019 22:08:55 -0000	1.44
+++ distinfo	7 Jul 2020 00:35:36 -0000
@@ -5,7 +5,7 @@ RMD160 (tcsh-6.22.02.tar.gz) = f6c7d6521
 SHA512 (tcsh-6.22.02.tar.gz) = 32d271b568c63265ea4c98494f5e60b37c3a3fc2594e8763b8f6f0b09018ab9db7ef6f951120b37f7880ccf04ba3a2559e30dc08d24f4ba9dc36853238d55980
 Size (tcsh-6.22.02.tar.gz) = 1006405 bytes
 SHA1 (patch-aa) = 6ec2bcee6029e733743a73d267aa51bfcc898843
-SHA1 (patch-ab) = 8cf26988778b5331360eb1aab98bfcc920c71ac2
+SHA1 (patch-ab) = 715d939e8a8f4917bd219dccd91d5c49ae502939
 SHA1 (patch-configure) = 6970c041a66910325d1fb53ebf8ab3627d764778
 SHA1 (patch-nls_Makefile.in) = 58d859e8a50e6436b9bc6514497eb876426d92d7
 SHA1 (patch-sh.h) = ac6211ddd5e552e9baec2d35aed5e7e573cab04e
Index: patches/patch-ab
===================================================================
RCS file: /cvsroot/pkgsrc/shells/tcsh/patches/patch-ab,v
retrieving revision 1.12
diff -p -u -r1.12 patch-ab
--- patches/patch-ab	25 May 2012 20:01:31 -0000	1.12
+++ patches/patch-ab	7 Jul 2020 00:35:36 -0000
@@ -1,10 +1,11 @@
 $NetBSD: patch-ab,v 1.12 2012/05/25 20:01:31 he Exp $
 
 Special adaptation for different NetBSD versions and for OpenBSD.
+Turn on SYSMALLOC for NetBSD until tc.alloc.c gets better.
 
---- config_f.h.orig	2006-08-28 10:53:04.000000000 -0400
-+++ config_f.h	2007-04-09 20:02:34.000000000 -0400
-@@ -44,7 +44,18 @@
+--- config_f.h.orig	2019-12-04 09:51:54.000000000 -0800
++++ config_f.h	2020-07-06 15:21:46.122410962 -0700
+@@ -47,7 +47,18 @@
   *	         of nls...
   *
   */
@@ -24,3 +25,12 @@ Special adaptation for different NetBSD 
  
  /*
   * WIDE_STRINGS	Represent strings using wide characters
+@@ -138,7 +149,7 @@
+  *		This can be much slower and no memory statistics will be
+  *		provided.
+  */
+-#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__) || defined (__CYGWIN__) || defined(__GLIBC__) || defined(__OpenBSD__) || defined(__APPLE__) || defined (__ANDROID__)
++#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__) || defined (__CYGWIN__) || defined(__GLIBC__) || defined(__OpenBSD__) || defined(__APPLE__) || defined (__ANDROID__) || defined(__NetBSD__)
+ # define SYSMALLOC
+ #else
+ # undef SYSMALLOC