Adapt for Certificate Transparency support in LibreSSL 3.5

Index: lib_pypy/_cffi_ssl/_cffi_src/openssl/ct.py
--- lib_pypy/_cffi_ssl/_cffi_src/openssl/ct.py.orig
+++ lib_pypy/_cffi_ssl/_cffi_src/openssl/ct.py
@@ -5,7 +5,7 @@
 from __future__ import absolute_import, division, print_function
 
 INCLUDES = """
-#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER
+#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER || CRYPTOGRAPHY_IS_LIBRESSL
 #include <openssl/ct.h>
 
 typedef STACK_OF(SCT) Cryptography_STACK_OF_SCT;
@@ -65,7 +65,7 @@ int SCT_set_log_entry_type(SCT *, ct_log_entry_type_t)
 """
 
 CUSTOMIZATIONS = """
-#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER
+#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER || CRYPTOGRAPHY_IS_LIBRESSL
 static const long Cryptography_HAS_SCT = 1;
 #else
 static const long Cryptography_HAS_SCT = 0;