update autoconf for latest compat functions

crypto/compat/posix_win.c

@@ -4,6 +4,7 @@
  * BSD socket emulation code for Winsock2
  * File IO compatibility shims
  * Brent Cook <bcook@openbsd.org>
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
  */
 
 #define NO_REDEF_POSIX_FUNCTIONS
@@ -208,6 +209,12 @@ posix_setsockopt(int sockfd, int level, int optname,
 	return rc == 0 ? 0 : wsa_errno(WSAGetLastError());
 }
 
+uid_t getuid(void)
+{
+	/* Windows fstat sets 0 as st_uid */
+	return 0;
+}
+
 #ifdef _MSC_VER
 struct timezone;
 int gettimeofday(struct timeval * tp, struct timezone * tzp)