Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/sfnt/ttkern.h

Index: third_party/freetype2/src/src/sfnt/ttkern.h
diff --git a/third_party/freetype2/src/src/sfnt/ttkern.h b/third_party/freetype2/src/src/sfnt/ttkern.h
new file mode 100644
index 0000000000000000000000000000000000000000..89cb24f07ce26d6e7b4b376cbb7b692abcf21be2
--- /dev/null
+++ b/third_party/freetype2/src/src/sfnt/ttkern.h
@@ -0,0 +1,52 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ttkern.h                                                               */
+/*                                                                         */
+/*    Load the basic TrueType kerning table.  This doesn't handle          */
+/*    kerning data within the GPOS table at the moment.                    */
+/*                                                                         */
+/*  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 __TTKERN_H__
+#define __TTKERN_H__
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_STREAM_H
+#include FT_INTERNAL_TRUETYPE_TYPES_H
+
+
+FT_BEGIN_HEADER
+
+
+  FT_LOCAL( FT_Error  )
+  tt_face_load_kern( TT_Face    face,
+                     FT_Stream  stream );
+
+  FT_LOCAL( void )
+  tt_face_done_kern( TT_Face  face );
+
+  FT_LOCAL( FT_Int )
+  tt_face_get_kerning( TT_Face     face,
+                       FT_UInt     left_glyph,
+                       FT_UInt     right_glyph );
+
+#define TT_FACE_HAS_KERNING( face )  ( (face)->kern_avail_bits != 0 )
+
+
+FT_END_HEADER
+
+#endif /* __TTKERN_H__ */
+
+
+/* END */