Fixes to prep_libc.py to support correct stripping of x64 libcmt on x64 target

base/allocator/prep_libc.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 The Chromium 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 takes libcmt.lib for VS2005/08/10 and removes the allocation
 # related functions from it.
 #
 # Usage: prep_libc.py <VCInstallDir> <OutputDir>
 #
 # VCInstallDir is the path where VC is installed, something like:
 #    C:\Program Files\Microsoft Visual Studio 8\VC\

[rvargas (doing something else), 2013/02/14 02:37:11]

This should have "lib" at the end.

 #
 # OutputDir is the directory where the modified libcmt file should be stored.
 
 import os
 import shutil
 import subprocess
 import sys
 
 def run(command, filter=None):
   """Run |command|, removing any lines that match |filter|. The filter is
   to remove the echoing of input filename that 'lib' does."""
   popen = subprocess.Popen(
       command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
   out, _ = popen.communicate()
   for line in out.splitlines():
     if filter and line.strip() != filter:
       print line
   return popen.returncode
 
 def main():
   vs_install_dir = sys.argv[1]
   outdir = sys.argv[2]
+  if "x64" in sys.argv[2]:
+    vs_install_dir = os.path.join(vs_install_dir, 'amd64')
   output_lib = os.path.join(outdir, 'libcmt.lib')
   shutil.copyfile(os.path.join(vs_install_dir, 'libcmt.lib'), output_lib)
   shutil.copyfile(os.path.join(vs_install_dir, 'libcmt.pdb'),
                   os.path.join(outdir, 'libcmt.pdb'))
   vspaths = [
     'build\\intel\\mt_obj\\',
     'f:\\dd\\vctools\\crt_bld\\SELF_X86\\crt\\src\\build\\INTEL\\mt_obj\\',
     'F:\\dd\\vctools\\crt_bld\\SELF_X86\\crt\\src\\build\\INTEL\\mt_obj\\nativec\\\\',
     'F:\\dd\\vctools\\crt_bld\\SELF_X86\\crt\\src\\build\\INTEL\\mt_obj\\nativecpp\\\\',
   ]
   objfiles = ['malloc', 'free', 'realloc', 'new', 'delete', 'new2', 'delete2',
               'align', 'msize', 'heapinit', 'expand', 'heapchk', 'heapwalk',
               'heapmin', 'sbheap', 'calloc', 'recalloc', 'calloc_impl',
               'new_mode', 'newopnt']
   for obj in objfiles:
     for vspath in vspaths:
       cmd = ('lib /nologo /ignore:4006,4014,4221 /remove:%s%s.obj %s' %
              (vspath, obj, output_lib))
       run(cmd, obj + '.obj')
 
 if __name__ == "__main__":
   sys.exit(main())