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

xz/src/liblzma/common/easy_preset.h

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_preset.h
+/// \brief      Preset handling for easy encoder and decoder
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+typedef struct {
+        /// We need to keep the filters array available in case
+        /// LZMA_FULL_FLUSH is used.
+        lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+        /// Options for LZMA2
+        lzma_options_lzma opt_lzma;
+
+        // Options for more filters can be added later, so this struct
+        // is not ready to be put into the public API.
+
+} lzma_options_easy;
+
+
+/// Set *easy to the settings given by the preset. Returns true on error,
+/// false on success.
+extern bool lzma_easy_preset(lzma_options_easy *easy, uint32_t preset);