Workaround for OpenSSL 1.0.2t/u to handle unnamed but really named curves

PR #5362

Obtained from:
https://github.com/pyca/cryptography/commit/241f845071a8747d0986ed60575e28840f096b79

--- src/_cffi_src/openssl/cryptography.py.orig	2020-04-22 22:27:48 UTC
+++ src/_cffi_src/openssl/cryptography.py
@@ -47,6 +47,8 @@ INCLUDES = """
     (OPENSSL_VERSION_NUMBER >= 0x10002000 && !CRYPTOGRAPHY_IS_LIBRESSL)
 #define CRYPTOGRAPHY_OPENSSL_102L_OR_GREATER \
     (OPENSSL_VERSION_NUMBER >= 0x100020cf && !CRYPTOGRAPHY_IS_LIBRESSL)
+#define CRYPTOGRAPHY_OPENSSL_102U_OR_GREATER \
+    (OPENSSL_VERSION_NUMBER >= 0x1000215fL && !CRYPTOGRAPHY_IS_LIBRESSL)
 #define CRYPTOGRAPHY_OPENSSL_110_OR_GREATER \
     (OPENSSL_VERSION_NUMBER >= 0x10100000 && !CRYPTOGRAPHY_IS_LIBRESSL)
 #define CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER \
@@ -68,6 +70,7 @@ INCLUDES = """
 
 TYPES = """
 static const int CRYPTOGRAPHY_OPENSSL_102L_OR_GREATER;
+static const int CRYPTOGRAPHY_OPENSSL_102U_OR_GREATER;
 static const int CRYPTOGRAPHY_OPENSSL_110_OR_GREATER;
 static const int CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER;