Fixes problem with running test.py --arch dartc --mode release,debug

tools/test.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 
 """Test driver for the Dart project used by continuous build and developers."""
 
 
@@ skipping 1207 matching lines @@
   for mode in options.mode:
     if not mode in ['debug', 'release']:
       print 'Unknown mode %s' % mode
       return False
   for arch in options.arch:
     if not arch in ['ia32', 'x64', 'simarm', 'arm', 'dartc', 'dartium',
                     'chromium']:
       print 'Unknown arch %s' % arch
       return False
   options.flags = []
-  if (arch == 'dartc' or arch == 'chromium') and mode == 'release':
-    options.flags.append('--optimize')
   options.flags.append('--ignore-unrecognized-flags')
   if options.checked:
     options.flags.append('--enable_asserts')
     options.flags.append('--enable_type_checks')
   if options.optimize:
     options.flags.append('--optimize')
   for flag in options.flag:
     options.flags.append(flag)
   if options.verbose:
     print 'Flags on the command line:'
@@ skipping 241 matching lines @@
     for entry in timed_tests[:20]:
       t = FormatTime(entry.duration)
       print '%4i (%s) %s' % (index, t, entry.GetLabel())
       index += 1
 
   return result
 
 
 if __name__ == '__main__':
   sys.exit(Main())