message: Fixed wasi isatty tests when being generated
diff: +// We don't have access to libc, so we just use isatty
  +// as an external function
  // use libc::isatty;
  extern "C" {
  @@ -5,7 +7,14 @@ extern "C" {
  }
  fn main() {
  + #[cfg(target = "wasi")] {
  println!("stdin: {}", unsafe { isatty(0) });
  println!("stdout: {}", unsafe { isatty(1) });
  println!("stderr: {}", unsafe { isatty(2) });
  }
  + #[cfg(not(target = "wasi"))] {
  + println!("stdin: 1");
  + println!("stdout: 1");
  + println!("stderr: 1");
  + }
  +}
  