Do not put runtime patch files in the SDK.

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # 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.
 #
 # A script which will be invoked from gyp to create an SDK.
 #
 # Usage: create_sdk.py sdk_directory
 #
@@ skipping 389 matching lines @@
   # Create and populate lib/coreimpl.
   #
 
   # First, copy corelib/src/implementation to corelib/runtime.
   for filename in coreimpl_sources:
     for target_dir in ['runtime']:
       copyfile(join('corelib', 'src', 'implementation', filename),
                join(coreimpl_dest_dir, target_dir, filename))
 
   for filename in coreimpl_runtime_sources:
-    if filename.endswith('.dart'):
+    if filename.endswith('.dart') and not filename.endswith('_patch.dart')::
       copyfile(join('runtime', 'lib', filename),
                join(coreimpl_dest_dir, 'runtime', filename))
 
   # Construct lib/coreimpl/coreimpl_runtime.dart from whole cloth.
   dest_file = open(join(coreimpl_dest_dir, 'coreimpl_runtime.dart'), 'w')
   dest_file.write('#library("dart:coreimpl");\n')
   for filename in coreimpl_sources:
     dest_file.write('#source("runtime/' + filename + '");\n')
   for filename in coreimpl_runtime_sources:
-    if filename.endswith('.dart'):
+    if filename.endswith('.dart') and not filename.endswith('_patch.dart')::
       dest_file.write('#source("runtime/' + filename + '");\n')
   dest_file.close()
 
 
   # Create and copy pkg.
   PKG = join(SDK_tmp, 'pkg')
   os.makedirs(PKG)
 
   #
   # Create and populate pkg/{i18n, logging}
@@ skipping 54 matching lines @@
   if revision is not None:
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   move(SDK_tmp, SDK)
   utils.Touch(os.path.join(SDK, 'create.stamp'))
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))