message: print list of failed tests in summary
diff: @@ -209,6 +209,11 @@ pub fn run_tests(config: Config) {
  eprintln!();
  }
  }
  + eprintln!("{}", "failures:".red().underline());
  + for (path, _miri, _revision, _errors, _stderr) in &failures {
  + eprintln!(" {}", path.display());
  + }
  + eprintln!();
  eprintln!(
  "test result: {}. {} tests failed, {} tests passed, {} ignored, {} filtered out",
  "FAIL".red(),
  