$NetBSD$

Do not change MACHINETYPE needlessly.  Doing so prevents easy
discovery of the build directory.

--- src/Makefile.orig	2020-08-03 07:31:39.000000000 +0000
+++ src/Makefile
@@ -344,10 +344,6 @@ OSTYPE      := $(shell echo `uname`)
 OSVERSION   := $(shell echo `uname -r`)
 MACHINETYPE := $(shell echo `uname -m`)
 
-ifeq (${MACHINETYPE}, x86_64)
-  MACHINETYPE = amd64
-endif
-
 ifeq (${MACHINETYPE}, Power Macintosh)
   MACHINETYPE = ppc
 endif