Fix bug in frog_wrapper.py that caused it to eat the first argument

dart/tools/testing/architecture.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
 import platform
 import re
 import shutil
 import subprocess
@@ skipping 518 matching lines @@
   def Cleanup(self):
     return
 
 
 class LegArchitecture(StandaloneArchitecture):
 
   def __init__(self, root_path, arch, mode, component, test):
     super(LegArchitecture, self).__init__(root_path, arch, mode, component,
                                           test)
   def GetOptions(self):
-    return ['--enable_leg', '--leg_only']
+    return ['--leg_only']
 
   def GetExecutable(self):
     """Returns the path to the Dart test runner (executes the .dart file)."""
     return utils.GetDartRunner(self.mode, self.arch, 'frog')
 
 
 # Long term, we should do the running machinery that is currently in
 # DartRunner.java
 class DartcArchitecture(StandaloneArchitecture):
   """Runs the Dart ->JS compiler then runs the result in a standalone JS VM."""
@@ skipping 46 matching lines @@
     return WebDriverArchitecture(root_path, arch, mode, component, test)
 
   elif component in ['vm', 'frog', 'frogsh']:
     return StandaloneArchitecture(root_path, arch, mode, component, test)
 
   elif component == 'leg':
     return LegArchitecture(root_path, arch, mode, component, test)
 
   elif component == 'dartc':
     return DartcArchitecture(root_path, arch, mode, component, test)