[VM interpreter] Fix interpreter build after recent change to Instructions.
[VM interpreter] Fix interpreter build after recent change to Instructions.

Change-Id: I5692403abdc21ad1de9cbad34912f68283cf6338
Reviewed-on: https://dart-review.googlesource.com/70320
Reviewed-by: Samir Jindel <5720a19f3a84f5405fa0776737a4149175e41e6a@google.com>
Commit-Queue: Régis Crelier <c2bf536a10d9f2530c38e4e8da517718be8c39ce@google.com>

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