stop exposing hidden defines in public opensslconf.h

pull in hidden headers instead, patching drectly for Windows support

patches/crypto_namespace.h.patch

@@ -0,0 +1,13 @@
+--- crypto/hidden/crypto_namespace.h.orig	2023-02-28 00:41:43.212756628 -0600
++++ crypto/hidden/crypto_namespace.h	2023-02-28 00:42:01.152756349 -0600
+@@ -18,6 +18,10 @@
+ #ifndef _LIBCRYPTO_CRYPTO_NAMESPACE_H_
+ #define _LIBCRYPTO_CRYPTO_NAMESPACE_H_
+ 
++#if defined(_MSC_VER) && !defined(__clang__) && !defined(__attribute__)
++#define __attribute__(a)
++#endif
++
+ /*
+  * If marked as 'used', then internal calls use the name with prefix "_lcry_"
+  * and we alias that to the normal name *and* the name with prefix "_libre_";