Making dom.py build command only build the runtime.

tools/dom/dom.py

 #!/usr/bin/python
 
 # Copyright (c) 2013, 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.
 
 # A script which makes it easy to execute common DOM-related tasks
 
 import os
 import subprocess
@@ skipping 24 matching lines @@
 def analyze():
   ''' Runs the dart analyzer. '''
   call([
     os.path.join(dart_out_dir, 'dart-sdk', 'bin', 'dart_analyzer'),
     os.path.join('tests', 'html', 'element_test.dart'),
     '--dart-sdk', 'sdk',
     '--show-sdk-warnings',
   ])
 
 def build():
-  ''' Builds the SDK '''
+  ''' Builds the Dart binary '''
   call([
     os.path.join('tools', 'build.py'),
     '--mode=release',
     '--arch=ia32',
+    'runtime',
   ])
 
 def dart2js():
   compile_dart2js(argv.pop(0), True)
 
 def dartc():
   call([
     os.path.join('tools', 'test.py'),
     '-m',
     'release',
@@ skipping 118 matching lines @@
     init_dir()
     command = argv.pop(0)
 
     if not command in commands:
       help();
       return
     commands[command][0]()
 
 if __name__ == '__main__':
   main(sys.argv)