Make perl reproducible between bwrap and hardware

Also, with these changes, change the architecture to i686, as per
previous commits.

steps/perl-5.8.9/files/config.over

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+osvers=4.14.0
+myarchname=i686-linux
+myuname="linux live-bootstrap 4.14.0 #1 i686 gnulinux "

steps/perl-5.8.9/pass1.sh

@@ -68,7 +68,7 @@ src_configure() {
         -Dusedl=false \
         -Ddate=':' \
         -Dccflags="-U__DATE__ -U__TIME__" \
-        -Darchname="i386-linux" \
+        -Darchname="i686-linux" \
         -Dmyhostname="(none)" \
         -Dmaildomain="(none)"
 }