replace prep_libc.sh with prep_libc.py, and quiet the output

base/allocator/prep_libc.sh

-#!/bin/sh
-# 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 and removes the allocation related
-# functions from it.
-#
-# Usage: prep_libcmt.bat <VCInstallDir> <OutputFile>
-#
-# VCInstallDir is the path where VC is installed, typically:
-#    C:\Program Files\Microsoft Visual Studio 8\VC\
-#
-# OutputFile is the directory where the modified libcmt file should be stored.
-#
-
-LIBCMT="${1}\\libcmt.lib"
-LIBCMTPDB="${1}\\libcmt.pdb"
-OUTDIR=$2
-OUTCMT="${2}\\libcmt.lib"
-
-mkdir -p $OUTDIR
-cp "$LIBCMT" "$OUTDIR"
-cp "$LIBCMTPDB" "$OUTDIR"
-
-
-# We'll remove the symbols based on paths found in either the VS2005 or VS2008
-# libcmt.lib files.
-LIBCMTSRCPATHVS2005="build\\intel\\mt_obj\\"
-LIBCMTSRCPATHVS2008="f:\\dd\\vctools\\crt_bld\\SELF_X86\\crt\\src\\build\\INTEL\\mt_obj\\"
-
-OBJFILES="malloc.obj free.obj realloc.obj new.obj delete.obj new2.obj delete2.obj align.obj msize.obj heapinit.obj expand.obj heapchk.obj heapwalk.obj heapmin.obj sbheap.obj calloc.obj recalloc.obj calloc_impl.obj new_mode.obj newopnt.obj"
-
-for FILE in $OBJFILES
-do
-  echo ${FILE}
-  LIB /NOLOGO /IGNORE:4006,4014,4221 /REMOVE:${LIBCMTSRCPATHVS2005}${FILE} $OUTCMT
-  LIB /NOLOGO /IGNORE:4006,4014,4221 /REMOVE:${LIBCMTSRCPATHVS2008}${FILE} $OUTCMT
-done