Fix for bug 8764 that breaks prebuilts for files with more than just keyword pairs.

prebuilt_unittest.py

 #!/usr/bin/python
 # 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.
 
 import mox
 import os
 import prebuilt
 import shutil
 import tempfile
 import unittest
 from chromite.lib import cros_build_lib
 
 class TestUpdateFile(unittest.TestCase):
 
   def setUp(self):
     self.contents_str = ['# comment that should be skipped',
                          'PKGDIR="/var/lib/portage/pkgs"',
                          'PORTAGE_BINHOST="http://no.thanks.com"',
-                         'portage portage-20100310.tar.bz2']
+                         'portage portage-20100310.tar.bz2',
+                         'COMPILE_FLAGS="some_value=some_other"',
+                         ]
     temp_fd, self.version_file = tempfile.mkstemp()
     os.write(temp_fd, '\n'.join(self.contents_str))
     os.close(temp_fd)
 
   def tearDown(self):
     os.remove(self.version_file)
 
   def _read_version_file(self):
     """Read the contents of self.version_file and return as a list."""
     version_fh = open(self.version_file)
@@ skipping 191 matching lines @@
     temp_packages_file.flush()
     new_packages_file = prebuilt.FilterPackagesFile(temp_packages_file.name)
     new_contents = open(new_packages_file.name).read()
     self.assertEqual("".join(private_packages_file), new_contents)
     self.assertEqual("".join(private_packages_file), new_packages_file.read())
     new_packages_file.close()
 
 
 if __name__ == '__main__':
   unittest.main()