Add options to check TLS signing hashes

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2235)
diff --git a/test/ssl_test_ctx.h b/test/ssl_test_ctx.h
index f67f01a..b34efe3 100644
--- a/test/ssl_test_ctx.h
+++ b/test/ssl_test_ctx.h
@@ -163,8 +163,12 @@
     int expected_tmp_key_type;
     /* Expected server certificate key type */
     int expected_server_cert_type;
+    /* Expected server signing hash */
+    int expected_server_sign_hash;
     /* Expected client certificate key type */
     int expected_client_cert_type;
+    /* Expected client signing hash */
+    int expected_client_sign_hash;
 } SSL_TEST_CTX;
 
 const char *ssl_test_result_name(ssl_test_result_t result);