Add patch, missed in previous.


(schmonz)

$NetBSD: patch-Makefile.in,v 1.1 2021/06/14 20:45:22 schmonz Exp $

From MacPorts:
Rename VERSION to VERSION.txt so that it does not collide with the C++
version header on case-insensitive filesystems.

<https://gitlab.com/libtiff/libtiff/-/issues/252>

--- Makefile.in.orig	2021-04-16 10:56:02.000000000 +0000
+++ Makefile.in
@@ -424,7 +424,7 @@ docfiles = \
 	README.md \
 	RELEASE-DATE \
 	TODO \
-	VERSION
+	VERSION.txt
 
 EXTRA_DIST = \
 	cmake \
@@ -992,7 +992,7 @@ distcheck-hook:
 
 release:
 	(rm -f $(top_srcdir)/RELEASE-DATE && echo $(LIBTIFF_RELEASE_DATE) > $(top_srcdir)/RELEASE-DATE)
-	(rm -f $(top_srcdir)/VERSION && echo $(LIBTIFF_VERSION) > $(top_srcdir)/VERSION)
+	(rm -f $(top_srcdir)/VERSION.txt && echo $(LIBTIFF_VERSION) > $(top_srcdir)/VERSION.txt)
 	(rm -f $(top_srcdir)/libtiff/tiffvers.h && sed 's,LIBTIFF_VERSION,$(LIBTIFF_VERSION),;s,LIBTIFF_RELEASE_DATE,$(LIBTIFF_RELEASE_DATE),' $(top_srcdir)/libtiff/tiffvers.h.in > $(top_srcdir)/libtiff/tiffvers.h)
 coverity:
 	$(MAKE) clean