VMS: arch in config.com was mistakenly made process global

Reviewed-by: Tim Hudson <tjh@openssl.org>

config.com

diff --git a/config.com b/config.com
index 015de51..ed4df15 100644
--- a/config.com
+++ b/config.com
@@ -14,7 +14,7 @@
 $	! -h		prints a usage and exits
 $	! -t		test mode, doesn't run Configure
 $
-$	arch == f$edit( f$getsyi( "arch_name"), "lowercase")
+$	arch = f$edit( f$getsyi( "arch_name"), "lowercase")
 $	pointer_size = ""
 $	test = 0
 $	here = F$PARSE("A.;",F$ENVIRONMENT("PROCEDURE"),,,"SYNTAX_ONLY") - "A.;"