tests/benchmark: add --huge-buffers option for cipher tests
* tests/benchmark.c (huge_buffers, cipher_encrypt, cipher_decrypt): New. (cipher_bench): Add 'max_inlen' to modes structure; add huge buffers mode selection. (main): Add '--huge-buffers'.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>