Move tools/llvm/driver to pnacl/driver.

tools/llvm/driver/redirect.bat

-@echo off
-:: Copyright (c) 2011 The Native Client 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 file is installed for each driver file so that the driver can
-:: be run from outside Cygwin. This file will be installed as bin/pnacl-*.bat
-:: inside the PNaCl directory. For example, if you invoke:
-::
-::  C:\> path\to\pnacl\bin\pnacl-gcc hello.c -o hello.pexe
-::
-:: inside the Windows command prompt, then Windows runs pnacl-gcc.bat.
-:: This script will in turn run:
-:: "python path\to\pnacl\bin\pnacl-gcc hello.c -o hello.pexe"
-
-setlocal
-
-:: Stop incessant CYGWIN complains about "MS-DOS style path"
-set CYGWIN=nodosfilewarning %CYGWIN%
-
-:: TODO(pdox): For the toolchain to be hermetic and relocatable,
-:: we may need to arrange to include Python in our distribution.
-:: For now, use the Python included in the repository checkout.
-set PATH=%~dp0..\..\..\..\third_party\python_26;%PATH%
-
-:: Run the driver
-:: For now, assume "python" is in the PATH.
-python -OO "%~dp0\%~n0" %*
-
-:end