Process arguments in runMe to extract the environment and selectors
Process arguments in runMe to extract the environment and selectors

Bug: https://github.com/dart-lang/sdk/issues/31177
Change-Id: I7c3190c95f81fb580bfa6c142d6ea9726548e343
Reviewed-on: https://dart-review.googlesource.com/15765
Reviewed-by: Peter von der Ahé <ad40f903ca639ca334d95dc5a5f0ae92bd708079@google.com>
Commit-Queue: Sigmund Cherem <beaea8fd7d2a56555046ba4f362c8a93e3938576@google.com>

dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk