74a23b96b0
This includes a `--target` flag (that in the future we can use for other targets
too) and a flag to accept the libraries.json file (currently needed to properly
compute constants of the form `bool.fromEnvironment('dart.library.io')`.
Change-Id: I8beea48610f0e1e721b7c76e545c9f662e3255ad
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96849
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Jake Macdonald <jakemac@google.com>