Remove 'dartc' as an arch for build.py.

tools/build.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.
 #
 
 import optparse
 import os
 import shutil
 import subprocess
 import sys
 import utils
 
 HOST_OS = utils.GuessOS()
 HOST_CPUS = utils.GuessCpus()
 armcompilerlocation = '/opt/codesourcery/arm-2009q1'
 
 def BuildOptions():
   result = optparse.OptionParser()
   result.add_option("-m", "--mode",
       help='Build variants (comma-separated).',
       metavar='[all,debug,release]',
       default='debug')
   result.add_option("-v", "--verbose",
       help='Verbose output.',
       default=False, action="store_true")
   result.add_option("--arch",
       help='Target architectures (comma-separated).',
-      metavar='[all,ia32,x64,simarm,arm,dartc]',
+      metavar='[all,ia32,x64,simarm,arm]',
       default=utils.GuessArchitecture())
   result.add_option("-j",
       help='The number of parallel jobs to run.',
       metavar=HOST_CPUS,
       default=str(HOST_CPUS))
   result.add_option("--devenv",
       help='Path containing devenv.com on Windows',
       default='C:\\Program Files (x86)\\Microsoft Visual Studio 9.0\\Common7\\IDE')
   return result
 
 
 def ProcessOptions(options):
   if options.arch == 'all':
     options.arch = 'ia32,x64,simarm'
   if options.mode == 'all':
     options.mode = 'debug,release'
   options.mode = options.mode.split(',')
   options.arch = options.arch.split(',')
   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']:
+    if not arch in ['ia32', 'x64', 'simarm', 'arm']:
       print "Unknown arch %s" % arch
       return False
   return True
 
 
 def setTools(arch):
   if arch == 'arm':
     toolsOverride = {
       "CC"  :  armcompilerlocation + "/bin/arm-none-linux-gnueabi-gcc",
       "CXX" :  armcompilerlocation + "/bin/arm-none-linux-gnueabi-g++",
@@ skipping 86 matching lines @@
       process.wait()
       if process.returncode != 0:
         print "BUILD FAILED"
         return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())