asymptote: Mark as NOT_FOR_BULK_PLATFORM on SunOS.

This currently hangs the build due to some Ghostscript incompatibility.  It's
not clear why this is only showing up on SunOS, but we just need bulk builds to
work again without manual intervention for a while.

graphics/asymptote/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.38 2020/08/31 18:09:37 wiz Exp $
+# $NetBSD: Makefile,v 1.39 2020/09/23 08:16:50 jperkin Exp $
 
 DISTNAME=	asymptote-2.41
 PKGREVISION=	5
@@ -50,6 +50,19 @@ SUBST_SED.python+=	-e "s|/usr/bin/env python|${PYTHONBIN:Q}|g"
 OPSYSVARS+=			TOOL_DEPENDS
 TOOL_DEPENDS.DragonFly+=	gtexinfo-[0-9]*:../../devel/gtexinfo
 
+#
+# Ghostscript running in a pipe fails with:
+#
+# ../asy -dir ../base -config "" -render=0 -f pdf -noprc helix.asy
+# GPL Ghostscript 9.53.0:
+#   *** EPS files may not contain multiple pages.
+#   *** Use of the %d filename format is required to output pages to multiple EPS files.
+# GPL Ghostscript 9.53.0: Unrecoverable error, exit code 1
+#
+# leaving asy hanging indefinitely.
+#
+NOT_FOR_BULK_PLATFORM+=	SunOS-*
+
 post-install:
 	${MV} ${DESTDIR}${PREFIX}/${PKGMANDIR}/man1/xasy.1x \
 		${DESTDIR}${PREFIX}/${PKGMANDIR}/man1/xasy.1