Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/include/freetype/ttunpat.h

Index: third_party/freetype2/src/include/freetype/ttunpat.h
diff --git a/third_party/freetype2/src/include/freetype/ttunpat.h b/third_party/freetype2/src/include/freetype/ttunpat.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ea556895c1856904f87d69a3df016ddf0a2be5c
--- /dev/null
+++ b/third_party/freetype2/src/include/freetype/ttunpat.h
@@ -0,0 +1,60 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ttunpat.h                                                              */
+/*                                                                         */
+/*    Definitions for the unpatented TrueType hinting system               */
+/*                                                                         */
+/*  Copyright 2003-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  Written by Graham Asher <graham.asher@btinternet.com>                  */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#ifndef __TTUNPAT_H__
+#define __TTUNPAT_H__
+
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+#ifdef FREETYPE_H
+#error "freetype.h of FreeType 1 has been loaded!"
+#error "Please fix the directory search order for header files"
+#error "so that freetype.h of FreeType 2 is found first."
+#endif
+
+
+FT_BEGIN_HEADER
+
+
+ /***************************************************************************
+  *
+  * @constant:
+  *   FT_PARAM_TAG_UNPATENTED_HINTING
+  *
+  * @description:
+  *   A constant used as the tag of an @FT_Parameter structure to indicate
+  *   that unpatented methods only should be used by the TrueType bytecode
+  *   interpreter for a typeface opened by @FT_Open_Face.
+  *
+  */
+#define FT_PARAM_TAG_UNPATENTED_HINTING  FT_MAKE_TAG( 'u', 'n', 'p', 'a' )
+
+  /* */
+
+
+FT_END_HEADER
+
+
+#endif /* __TTUNPAT_H__ */
+
+
+/* END */