Fix a few internals tests

The internals tests for chacha, poly1305 and siphash were erroneously
made conditional on if mdc2 was enabled.  Corrected to depend on the
correct algorithms being enabled instead.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2991)
3 files changed