Update freetype to 2.5.4.

third_party/freetype/include/ftttdrv.h

Index: third_party/freetype/include/ftttdrv.h
diff --git a/core/src/fxge/fx_freetype/fxft2.5.01/include/freetype/ftttdrv.h b/third_party/freetype/include/ftttdrv.h
similarity index 84%
rename from core/src/fxge/fx_freetype/fxft2.5.01/include/freetype/ftttdrv.h
rename to third_party/freetype/include/ftttdrv.h
index 01b25a4808bcd9ca5680351bcbe3fde238cc425c..358841397cac9ab20bfe6c75c67795b496bb46ae 100644
--- a/core/src/fxge/fx_freetype/fxft2.5.01/include/freetype/ftttdrv.h
+++ b/third_party/freetype/include/ftttdrv.h
@@ -20,8 +20,8 @@
 #ifndef __FTTTDRV_H__
 #define __FTTTDRV_H__
 
-#include "../ft2build.h"
-#include "freetype.h"
+#include <ft2build.h>
+#include FT_FREETYPE_H
 
 #ifdef FREETYPE_H
 #error "freetype.h of FreeType 1 has been loaded!"
@@ -61,7 +61,7 @@ FT_BEGIN_HEADER
    *   interpreter-version
    *
    * @description:
-   *   Currently, two versions are available which represent the bytecode
+   *   Currently, two versions are available, representing the bytecode
    *   interpreter with and without subpixel hinting support,
    *   respectively.  The default is subpixel support if
    *   TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel
@@ -134,13 +134,33 @@ FT_BEGIN_HEADER
    *   FT_CONFIG_OPTION_SUBPIXEL_HINTING, selecting version~38 causes an
    *   `FT_Err_Unimplemented_Feature' error.
    *
+   *   Depending on the graphics framework, Microsoft uses different
+   *   bytecode engines.  As a consequence, the version numbers returned by
+   *   a call to the `GETINFO[1]' bytecode instruction are more convoluted
+   *   than desired.
+   *
+   *   {
+   *      framework   Windows version   result of GETINFO[1]
+   *     ----------------------------------------------------
+   *       GDI         before XP         35
+   *       GDI         XP and later      37
+   *       GDI+ old    before Vista      37
+   *       GDI+ old    Vista, 7          38
+   *       GDI+        after 7           40
+   *       DWrite      before 8          39
+   *       DWrite      8 and later       40
+   *   }
+   *
+   *   Since FreeType doesn't provide all capabilities of DWrite ClearType,
+   *   using version~38 seems justified.
+   *
    */
 #define TT_INTERPRETER_VERSION_35  35
 #define TT_INTERPRETER_VERSION_38  38
 
-
  /* */
 
+
 FT_END_HEADER