Fix wallet/test/crypto_tests.cpp for OpenSSL 1.1 API.
Fix wallet/test/crypto_tests.cpp for OpenSSL 1.1 API.

This avoids a compile failure on newly installed debian stretch systems.

deadalnix/bitcoin,zander/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic,deadalnix/bitcoin,deadalnix/bitcoin,zander/bitcoinclassic,zander/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic,deadalnix/bitcoin,bitcoinclassic/bitcoinclassic,deadalnix/bitcoin,deadalnix/bitcoin,bitcoinclassic/bitcoinclassic,bitcoinclassic/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic