Replace hasher_Double with HASHER_*D

[saleemrashid]

This allows us to finely control when to use a single hash or a double hash in
various places. For example, Bitcoin signatures use double SHA256, but Decred
signatures use a single BLAKE256. However, both use double hashes for Base58.

[prusnak]

Looks nice. Will you be sending also PRs to trezor-mcu and trezor-core?

[saleemrashid]

@prusnak See trezor/trezor-mcu#274. From what I can tell, TREZOR Core doesn't yet use Hasher, so it shouldn't be affected by this.

[prusnak]

Great! Thanks for clarification.

[prusnak]

Please fix Travis build failures.

test_speed.c:168:72: error: too few arguments to function call, expected 6, have 5
                ecdsa_get_address(node.public_key, HASHER_SHA2, 0, addr, sizeof(addr));
test_speed.c:178:106: error: too few arguments to function call, expected 9, have 8
                hdnode_public_ckd_address_optimized(&pub, root.chain_code, i, 0, HASHER_SHA2, addr, sizeof(addr), false);

Not sure if this one is the only one.

[saleemrashid]

Fixed build failures, including OpenSSL 1.1 test failure.

[prusnak]

Thank you!