Fix build with opaque OCSP in LibreSSL 3.5.

Index: lib_pypy/_cffi_ssl/_cffi_src/openssl/ocsp.py
--- lib_pypy/_cffi_ssl/_cffi_src/openssl/ocsp.py.orig
+++ lib_pypy/_cffi_ssl/_cffi_src/openssl/ocsp.py
@@ -109,7 +109,7 @@ struct ocsp_basic_response_st {
 };
 #endif
 
-#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110 && LIBRESSL_VERSION_NUMBER < 0x3050000fL
 /* These functions are all taken from ocsp_cl.c in OpenSSL 1.1.0 */
 const OCSP_CERTID *OCSP_SINGLERESP_get0_id(const OCSP_SINGLERESP *single)
 {
@@ -148,7 +148,7 @@ const ASN1_OCTET_STRING *OCSP_resp_get0_signature(cons
 }
 #endif
 
-#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110J
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110J && LIBRESSL_VERSION_NUMBER < 0x3050000fL
 const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *bs)
 {
 #if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110