[dart/fuzzer] show exit/stdout/stderr on fail
[dart/fuzzer] show exit/stdout/stderr on fail

https://github.com/dart-lang/sdk/issues/37632

Change-Id: I38b996eca7f12b2f4e4d0412f1c922dd3999d60b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/110584
Reviewed-by: Felicitas Hetzelt <dd58ecf83e6dafb983e3eceed132b302900c5729@google.com>
Commit-Queue: Aart Bik <293afa0533434225484ba3f9bf2859340baba6ea@google.com>

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