This facilitates "universal" builds, ones that target multiple
architectures, e.g. ARMv5 through ARMv7. See commentary in
Configure for details.
Reviewed-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Pointer out and suggested by: Ard Biesheuvel.

(more for longer keys) on RSA/DSA.

I can't think of any other cause for failure

developers responsible for -march choice.

is fixed now.

accordingly.