[gardening] Increase debug app-jitk timeout
[gardening] Increase debug app-jitk timeout

The timeout was increased in:

https://github.com/dart-lang/sdk/commit/d6519499fe592471b11e77de8133aaed183a3775

to compensate for not running the kernel isolate from an app-jit.

Tests are still timing out on the debug bot, so this CL will see if
increasing the timeout there helps.

Change-Id: I71656b9b6bf5c23af68d00e288d8cddc415dd102
Reviewed-on: https://dart-review.googlesource.com/67482
Reviewed-by: Alexander Markov <239e774fd29abc1267878f57afe1a8a03e0ca887@google.com>
Commit-Queue: Zach Anderson <9f8b31e960a68dade71618f1ff6da6e23a1edfc9@google.com>

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