tests/basic: check 32-bit and 64-bit overflow for CTR and ChaCha20

* tests/basic.c (check_one_cipher_ctr_reset)
(check_one_cipher_ctr_overflow): New.
(check_one_cipher): Add counter overflow tests for ChaCha20 and CTR
mode.

Patch adds counter overflow tests to check for correct counter handling
in bulk processing implementations.

• Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>