Change back to building everything if no argument to build.py was given

dart.gyp

 # Copyright (c) 2012, 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.
 
 {
   'targets': [
     {
       # Contains all dependencies.
       'target_name': 'everything',
       'type': 'none',
       'dependencies': [
         # Most dependencies.
-        'default',
+        'most',
         # All other targets.
         'api_docs',
         'dartc_bot',
         'dart2js_bot',
         'dart2dart_bot',
       ],
     },
     {
-      # Contains all the dependencies that will run by default.
-      # Excludes api_docs.
-      'target_name': 'default',
+      'target_name': 'most',
       'type': 'none',
       'dependencies': [
         'analyzer',
         'compiler',
         'create_sdk',
         'dart2js',
         'editor',
         'packages',
         'runtime',
         'samples',
@@ skipping 194 matching lines @@
     },
     {
       'target_name': 'packages',
       'type': 'none',
       'dependencies': [
         'pkg/pkg.gyp:pkg_packages',
       ],
     },
   ],
 }