Continued cleanup of create_sdk.py now that we have sdk/bin in the  source repo. Review URL: https://codereview.chromium.org//11377106
Continued cleanup of create_sdk.py now that we have sdk/bin in the 
source repo.
Review URL: https://codereview.chromium.org//11377106

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@14807 260f80e4-7a28-3924-810f-c04153c831b5

dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk