message: cross-running windows-gnu should now also work
diff: @@ -44,4 +44,6 @@ if [ "$TRAVIS_OS_NAME" == linux ]; then
  elif [ "$TRAVIS_OS_NAME" == osx ]; then
  # cross-test 64bit Windows from macOS
  MIRI_TEST_TARGET=x86_64-pc-windows-msvc run_tests
  + # cross-test 32bit GNU Windows from macOS
  + MIRI_TEST_TARGET=i686-pc-windows-gnu run_tests
  fi
  