[tests/nnbd] Fix standalone/http_launch_test for simarm
[tests/nnbd] Fix standalone/http_launch_test for simarm

The test should mention .dart_tool/package_config.json in the
'OtherResources' comment so it is properly copied by the test tool.

Issue: https://github.com/dart-lang/sdk/issues/43614
Change-Id: I98420e0abb2751f518d69b21ade194d9a715266c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/165406
Reviewed-by: Régis Crelier <c2bf536a10d9f2530c38e4e8da517718be8c39ce@google.com>
Commit-Queue: Alexander Markov <239e774fd29abc1267878f57afe1a8a03e0ca887@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