add ENGINE set default methods
diff --git a/cryptography/hazmat/bindings/openssl/engine.py b/cryptography/hazmat/bindings/openssl/engine.py
index b76befc..457fb04 100644
--- a/cryptography/hazmat/bindings/openssl/engine.py
+++ b/cryptography/hazmat/bindings/openssl/engine.py
@@ -36,6 +36,18 @@
int ENGINE_ctrl_cmd_string(ENGINE *, const char *, const char *, int);
int ENGINE_set_default(ENGINE *, unsigned int);
int ENGINE_register_complete(ENGINE *);
+
+int ENGINE_set_default_RSA(ENGINE *);
+int ENGINE_set_default_string(ENGINE *, const char *);
+int ENGINE_set_default_DSA(ENGINE *);
+int ENGINE_set_default_ECDH(ENGINE *);
+int ENGINE_set_default_ECDSA(ENGINE *);
+int ENGINE_set_default_DH(ENGINE *);
+int ENGINE_set_default_RAND(ENGINE *);
+int ENGINE_set_default_ciphers(ENGINE *);
+int ENGINE_set_default_digests(ENGINE *);
+int ENGINE_set_default_pkey_meths(ENGINE *);
+int ENGINE_set_default_pkey_asn1_meths(ENGINE *);
"""
MACROS = """