Update freetype to 2.5.4.

third_party/freetype/src/cff/cf2font.h

Index: third_party/freetype/src/cff/cf2font.h
diff --git a/core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2font.h b/third_party/freetype/src/cff/cf2font.h
similarity index 98%
rename from core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2font.h
rename to third_party/freetype/src/cff/cf2font.h
index f9dd1bbd408a28bfec0b03a2f29fa39527217e61..d8860ce8ed5d904be9960fd28c1dcdbf7ed2c66f 100644
--- a/core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2font.h
+++ b/third_party/freetype/src/cff/cf2font.h
@@ -85,6 +85,8 @@ FT_BEGIN_HEADER
                              /* i.e. darkenX != 0 || darkenY != 0      */
     FT_Bool  stemDarkened;
 
+    FT_Int  darkenParams[8];              /* 1000 unit character space */
+
     /* variables that depend on both FontDict and Transform */
     CF2_Fixed  stdVW;     /* in character space; depends on dict entry */
     CF2_Fixed  stdHW;     /* in character space; depends on dict entry */