Update endian patch for mingw32.

3rdp/build/cl-endian.patch

---- misc/os_detect.h.orig	2019-06-03 15:44:11.100399000 -0400
-+++ misc/os_detect.h	2019-06-03 15:44:27.559718000 -0400
-@@ -566,6 +566,8 @@
+--- ../tmp2/misc/os_detect.h	2019-01-31 14:57:46.000000000 -0500
++++ misc/os_detect.h	2019-06-03 18:26:42.394038000 -0400
+@@ -566,6 +566,9 @@
  	#include <machine/endian.h>
    #elif defined( __NetBSD__ )
  	#include <sys/endian.h>
 +  #elif defined( __FreeBSD__ )
 +	#include <sys/endian.h>
++  #elif defined(__MINGW32__)
    #else
  	#include <endian.h>
    #endif /* Apple vs. everyone else */