b0aebc3b33
These scripts will be removed in a future version of Dart, so we switch to run ddc from either sources or from the snapshot instead. Change-Id: I1c8e2cf6014d484b5951ec66ae9c4f667470b435 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/229303 Reviewed-by: Alexander Thomas <athom@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>