Fix configuration system to support different architectures on Cygwin.

Fix configuration system to support different architectures on Cygwin.

This patch allows to recognize the architectures supported by Cygwin
and to choose the right configuration from there.  Drop -march to
use default architecture on 32 bit x86.

Drop pre-Cygwin-1.3 recognition since it's long gone and there's no
valid configuration for this anymore.

Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>