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

tests/co19/testcfg.py

 # 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.
 
 
 import os
 from os.path import join, exists
 import re
 
 import test
@@ skipping 32 matching lines @@
     # Parse the options by reading the .dart source file.
     source = self.GetSource()
     vm_options = utils.ParseTestOptions(test.VM_OPTIONS_PATTERN, source,
                                         self.context.workspace)
     dart_options = utils.ParseTestOptions(test.DART_OPTIONS_PATTERN, source,
                                           self.context.workspace)
 
     # Combine everything into a command array and return it.
     command = self.context.GetDart(self.mode, self.arch)
     command += self.context.flags
+    if self.mode == 'release': command += ['--optimize']
     if vm_options: command += vm_options
     if dart_options: command += dart_options
     else:
       command += [self.filename]
     return command
 
   def GetName(self):
     return self.path[-1]
 
   def GetPath(self):
@@ skipping 77 matching lines @@
       patterns[idx : idx] = ['*'] * (len(file) - len(path))
       path = [test.Pattern(p) for p in patterns]
 
     for i in xrange(len(path)):
       if not path[i].match(file[i]):
         return False
     return True
 
 def GetConfiguration(context, root):
   return Co19TestConfiguration(context, root)