For Windows, use _stat rather than stat

This allows for better flexibility with mixed /M compiler flags
Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3930)

crypto/store/loader_file.c

@@ -30,6 +30,10 @@
 
 #include "e_os.h"
 
+#ifdef _WIN32
+# define stat    _stat
+#endif
+
 /*-
  *  Password prompting
  *  ------------------