Use canonical versions of config.{guess,sub} instead of upstream's.
---
 config.guess |    5 +++++
 config.sub   |    5 +++++
 2 files changed, 10 insertions(+)

--- a/config.guess
+++ b/config.guess
@@ -1,4 +1,9 @@
 #! /bin/sh
+
+if [ -x /usr/share/misc/config.guess ]; then
+    exec /usr/share/misc/config.guess "$@"
+fi
+
 # Attempt to guess a canonical system name.
 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
 #   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
--- a/config.sub
+++ b/config.sub
@@ -1,4 +1,9 @@
 #! /bin/sh
+
+if [ -x /usr/share/misc/config.sub ]; then
+    exec /usr/share/misc/config.sub "$@"
+fi
+
 # Configuration validation subroutine script.
 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
 #   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010