19e844ed5b
Rationale: DART_TOP can now be provided through switch, as an environment variable or, by default, using the current directory from which script is started. This simplifies set up in cluster runs. Change-Id: Icb4f720b7a7bb7b349ce158d39574c271132c224 Reviewed-on: https://dart-review.googlesource.com/76201 Reviewed-by: Alexander Thomas <athom@google.com> Commit-Queue: Aart Bik <ajcbik@google.com>