Add initial support for color output in the build system

lib/naclports/binary_package.py

 # Copyright (c) 2014 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.
 
 import os
 import posixpath
 import shutil
 import tarfile
 
 from naclports import configuration, package, util, error
@@ skipping 120 matching lines @@
 
   def _Install(self):
     dest = util.GetInstallRoot(self.config)
     dest_tmp = os.path.join(dest, 'install_tmp')
     if os.path.exists(dest_tmp):
       shutil.rmtree(dest_tmp)
 
     if self.IsAnyVersionInstalled():
       raise error.Error('package already installed: %s' % self.InfoString())
 
-    util.Log("Installing %s" % self.InfoString())
+    self.LogStatus('Installing')

[binji, 2015/01/09 18:24:59]

this is going to do a lot more banners in non-color mode. What does it look
like? Probably OK either way.

[Sam Clegg, 2015/01/09 22:14:54]

Done.

     util.Makedirs(dest_tmp)
 
     names = []
     try:
       with tarfile.open(self.filename) as tar:
         for info in tar:
           if info.isdir():
             continue
           name = posixpath.normpath(info.name)
           if name == 'pkg_info':
@@ skipping 31 matching lines @@
 
   def WriteFileList(self, file_names):
     """Write the file list for this package."""
     filename = self.GetListFile()
     dirname = os.path.dirname(filename)
     if not os.path.isdir(dirname):
       util.Makedirs(dirname)
     with open(filename, 'w') as f:
       for name in file_names:
         f.write(name + '\n')