Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/liblzma/common/hardware_physmem.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       hardware_physmem.c
+/// \brief      Get the total amount of physical memory (RAM)
+//
+//  Author:     Jonathan Nieder
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+#include "tuklib_physmem.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_physmem(void)
+{
+        // It is simpler to make lzma_physmem() a wrapper for
+        // tuklib_physmem() than to hack appropriate symbol visiblity
+        // support for the tuklib modules.
+        return tuklib_physmem();
+}