$NetBSD: patch-Makefile,v 1.1 2022/09/20 19:38:26 wiz Exp $

Fix unportable test(1) operator.

--- Makefile.orig	2021-07-29 17:04:08.000000000 +0000
+++ Makefile
@@ -31,7 +31,7 @@ release:
 		\
 		cp LICENSE dist/$$t/.; \
 		cp cmd/minify/README.md dist/$$t/.; \
-		if [ "$$os" == "windows" ]; then \
+		if [ "$$os" = "windows" ]; then \
 			mv dist/$$t/${NAME} dist/$$t/${NAME}.exe; \
 			zip -jq dist/${NAME}_$$t.zip dist/$$t/*; \
 			cd dist; \