Add a script and target to run dartfix

Change-Id: I68df635359b898ef4b6054292f6523d81f46448a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/121149
Reviewed-by: Paul Berry <paulberry@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Keerti Parthasarathy <keertip@google.com>

https://dart.googlesource.com/sdk/+/6d468d13770452de1b7506eb5908ed28b106ae25
1 file changed
tree: 4daeed56e7780ca725a66f3f71253771f98f6621
  1. commits.json