$NetBSD$

Treat x86_64 like i386, as half the build system already does, and
hope it works.

--- common/i386/Imakefile~	2005-03-21 08:52:02.000000000 +0000
+++ common/i386/Imakefile
@@ -25,7 +25,7 @@
 
 #include "NASD.tmpl"
 
-#if defined(i386Architecture)
+#if defined(i386Architecture) || defined(__amd64__) || defined(__x86_64__)
 
 SRCS = \
 	nasd_rpcc.c
