Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/smooth/ftgrays.h

Index: third_party/freetype2/src/src/smooth/ftgrays.h
diff --git a/third_party/freetype2/src/src/smooth/ftgrays.h b/third_party/freetype2/src/src/smooth/ftgrays.h
new file mode 100644
index 0000000000000000000000000000000000000000..1b5760330c47e512e34e31d492a05573f36d1fe7
--- /dev/null
+++ b/third_party/freetype2/src/src/smooth/ftgrays.h
@@ -0,0 +1,58 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftgrays.h                                                              */
+/*                                                                         */
+/*    FreeType smooth renderer declaration                                 */
+/*                                                                         */
+/*  Copyright 1996-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  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 __FTGRAYS_H__
+#define __FTGRAYS_H__
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+
+#ifdef _STANDALONE_
+#include "ftimage.h"
+#else
+#include <ft2build.h>
+#include FT_CONFIG_CONFIG_H /* for FT_CONFIG_OPTION_PIC */
+#include FT_IMAGE_H
+#endif
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* To make ftgrays.h independent from configuration files we check       */
+  /* whether FT_EXPORT_VAR has been defined already.                       */
+  /*                                                                       */
+  /* On some systems and compilers (Win32 mostly), an extra keyword is     */
+  /* necessary to compile the library as a DLL.                            */
+  /*                                                                       */
+#ifndef FT_EXPORT_VAR
+#define FT_EXPORT_VAR( x )  extern  x
+#endif
+
+  FT_EXPORT_VAR( const FT_Raster_Funcs )  ft_grays_raster;
+
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif /* __FTGRAYS_H__ */
+
+
+/* END */