Use Directory.systemTemp getter in pkg subdirectory of repository.

BUG=
R=sgjesse@google.com

Review URL: https://codereview.chromium.org//25731003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/watcher@28218 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: d9d4036b7500a99bccbbae073e4644581c596947
  1. pkgs/