Use utilities from build directory instead of own copies

build_gyp/gyp_pdfium

 #!/usr/bin/env python
 #
 # 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.
 
 # This script is wrapper for PDFium that adds some support for how GYP
 # is invoked by PDFium beyond what can be done in the gclient hooks.
 
 import os
 import platform
 import sys
 
 script_dir = os.path.dirname(os.path.realpath(__file__))
 pdfium_root = os.path.abspath(os.path.join(script_dir, os.pardir))
 output_rel_dir = 'out'
 
 sys.path.insert(0, os.path.join(pdfium_root, 'tools', 'gyp', 'pylib'))
 import gyp
+
 # vs_toolchain needs to be after gyp path setting since it also uses gyp.
+sys.path.insert(0, os.path.join(pdfium_root, 'build'))
 import vs_toolchain
 
 def run_gyp(args):
   rc = gyp.main(args)
 
   # Copy Windows toolchain DLLs.
   vs_runtime_dll_dirs = vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
   if vs_runtime_dll_dirs:
     x64_runtime, x86_runtime = vs_runtime_dll_dirs
     vs_toolchain.CopyVsRuntimeDlls(
@@ skipping 29 matching lines @@
   vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
 
   print 'Updating projects from gyp files...'
   sys.stdout.flush()
 
   run_gyp(args)
 
 
 if __name__ == '__main__':
   sys.exit(main())