cmake: add openssl to the private deps list when it's the TLS implementation We might want OpenSSL to be the implementation for SHA-1 and/or TLS. If we only want it for TLS (e.g. we're building with the collision-detecting SHA-1 implementation) then we did not indicate this to the systems including us a static library. Add OpenSSL to the list also during the TLS decision to make sure we say we should link to it if we use it for TLS.