[presubmit] Add check for DDC's dart:_runtime lib
[presubmit] Add check for DDC's dart:_runtime lib

The logic in one subdirectory of the SDK is being unforked so
we need to ensure changes are mirrored in both directions.

Change-Id: I6485bcafe4ebaf135c5683660e8cac3bd9945033
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143003
Reviewed-by: Bob Nystrom <afede3a9ebedb865bee78398feff6fbe97068f17@google.com>
Commit-Queue: Nicholas Shahan <03847abd2d8aadfe859ecb98095a31f9f515dc47@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk