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

This reverts commit 927f2e5d.

Pointer out and suggested by: Ard Biesheuvel.

Result of joint effort with Ard Biesheuvel.

algorithm suggested in following paper:

Câmara, D.; Gouvêa, C. P. L.; López, J. & Dahab, R.: Fast Software
Polynomial Multiplication on ARM Processors using the NEON Engine.

http://conradoplg.cryptoland.net/files/2010/12/mocrysen13.pdf

(other processors unaffected).

PR: 3165

PR: 3165

Avoid occasional up to 8% performance drops.

PR: 3074

Thanks to Shay Gueron & Vlad Krasnov for report.

PR: 2963 and a number of others

path with spaces.

PR: 2835

tested, because kernel is not in shape to handle it *yet*. The code is
committed mostly to stimulate the kernel development.