Create temp directory for sdk inside the dart directory.

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 135 matching lines @@
 
 
 
 def Main(argv):
   # Pull in all of the gpyi files which will be munged into the sdk.
   io_runtime_sources = \
     (eval(open("runtime/bin/io_sources.gypi").read()))['sources']
 
   HOME = dirname(dirname(realpath(__file__)))
 
-  SDK_tmp = tempfile.mkdtemp()
   SDK = argv[1]
+  SDK_tmp = '%s.tmp' % SDK
 
   # TODO(dgrove) - deal with architectures that are not ia32.
 
   if exists(SDK):
     rmtree(SDK)
 
+  if exists(SDK_tmp):
+    rmtree(SDK_tmp)
+
+  os.makedirs(SDK_tmp)
+
   # Create and populate sdk/bin.
   BIN = join(SDK_tmp, 'bin')
   os.makedirs(BIN)
 
   # Copy the Dart VM binary and the Windows Dart VM link library
   # into sdk/bin.
   #
   # TODO(dgrove) - deal with architectures that are not ia32.
   build_dir = os.path.dirname(argv[1])
   dart_file_extension = ''
@@ skipping 170 matching lines @@
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   Copy(join(HOME, 'README.dart-sdk'), join(SDK_tmp, 'README'))
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))