py3: update check_boot_jars

#!/usr/bin/env python

from __future__ import print_function

"""

Check boot jars.

      package_name = package_name.replace('/', '.')

      # Skip class without a package name

      if package_name and not whitelist_re.match(package_name):

        print >> sys.stderr, ('Error: %s: unknown package name of class file %s'

                              % (jar, f))

        print('Error: %s: unknown package name of class file %s'

              % (jar, f), file=sys.stderr)

        return False

  return True

def main(argv):

  if len(argv) < 2:

    print __doc__

    print(__doc__)

    return 1

  if not LoadWhitelist(argv[0]):