bsaes-armv7.pl: take it into build loop.
bsaes-armv7.pl: add bsaes_cbc_encrypt and bsaes_ctr32_encrypt_blocks.

Submitted by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

Contributor claims ~50% improvement in CTR and ~9% in CBC decrypt
on Cortex-A15.