$NetBSD: patch-config.guess,v 1.1 2021/07/14 13:19:42 schmonz Exp $

Apply upstream eb95c29 to fix macOS M1 build.

--- config.guess.orig	2019-12-17 21:45:04.000000000 +0000
+++ config.guess
@@ -1238,6 +1238,9 @@ EOF
     *:Rhapsody:*:*)
 	echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
 	exit ;;
+    arm64:Darwin:*:*)
+	echo arm64-apple-darwin${UNAME_RELEASE}
+	exit ;;
     *:Darwin:*:*)
 	UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
 	case $UNAME_PROCESSOR in