Fix all relative includes to third_party.

core/src/fxge/freetype/fx_freetype.c

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fxge/fx_freetype.h"
-#include "../../../../third_party/freetype/src/psnames/pstables.h"
+#include "third_party/freetype/src/psnames/pstables.h"
 
 static int xyq_search_node(char* glyph_name, int name_offset, int table_offset, wchar_t unicode)
 {
     int i, count;
 
     // copy letters
     while (1) {
         glyph_name[name_offset] = ft_adobe_glyph_list[table_offset] & 0x7f;
         name_offset++;
         table_offset++;
@@ skipping 154 matching lines @@
     count = ft_adobe_glyph_list[1];
     for (i = 0; i < count; i++) {
         int child_offset = ft_adobe_glyph_list[i * 2 + 2] * 256 + ft_adobe_glyph_list[i * 2 + 3];
         if (xyq_search_node(glyph_name, 0, child_offset, unicode))
             return;
     }
 
     // failed, clear the buffer
     glyph_name[0] = 0;
 }