Fix handling of array arguments in chromite cros_build_lib.

chromite/lib/cros_build_lib.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Common python commands used by various build scripts."""
 
 import os
 import re
 import subprocess
 import sys
@@ skipping 60 matching lines @@
   else:
     if enter_chroot: cmd = ['./enter_chroot.sh', '--'] + cmd
     cmd_str = ' '.join(cmd)
 
   # Print out the command before running.
   if print_cmd:
     Info('RunCommand: %s' % cmd_str)
   cmd_result.cmd = cmd_str
 
   try:
-    proc = subprocess.Popen(cmd_str, cwd=cwd, stdin=stdin,
-                            stdout=stdout, stderr=stderr,
-                            shell=shell)
+    proc = subprocess.Popen(cmd, cwd=cwd, stdin=stdin, stdout=stdout,
+                            stderr=stderr, shell=shell)
     (cmd_result.output, cmd_result.error) = proc.communicate(input)
     if exit_code:
       cmd_result.returncode = proc.returncode
 
     if not error_ok and proc.returncode:
       msg = ('Command "%s" failed.\n' % cmd_str +
              (error_message or cmd_result.error or cmd_result.output or ''))
       raise RunCommandError(msg)
   # TODO(sosa): is it possible not to use the catch-all Exception here?
   except Exception, e:
@@ skipping 149 matching lines @@
   Returns:
     a string: absolute path to output directory.
   """
   src_root = GetSrcRoot()
   rel_path = 'build/images/%s' % board
   # ASSUME: --build_attempt always sets to 1
   version_str = '-'.join([cros_version, 'a1'])
   output_dir = os.path.join(os.path.dirname(src_root), rel_path, version_str)
   Info ('output_dir = %s' % output_dir)
   return output_dir