message: Add cfsetispeed and cfsetospeed stubs for redox
diff: @@ -114,6 +114,14 @@ pub unsafe extern "C" fn cfsetispeed(termios_p: *mut termios, speed: speed_t) ->
  }
  }
  +#[cfg(target_os = "redox")]
  +#[no_mangle]
  +pub unsafe extern "C" fn cfsetispeed(termios_p: *mut termios, speed: speed_t) -> c_int {
  + //TODO
  + platform::errno = errno::EINVAL;
  + -1
  +}
  +
  #[cfg(target_os = "linux")]
  #[no_mangle]
  pub unsafe extern "C" fn cfsetospeed(termios_p: *mut termios, speed: speed_t) -> c_int {
  @@ -129,6 +137,14 @@ pub unsafe extern "C" fn cfsetospeed(termios_p: *mut termios, speed: speed_t) ->
  }
  }
  +#[cfg(target_os = "redox")]
  +#[no_mangle]
  +pub unsafe extern "C" fn cfsetospeed(termios_p: *mut termios, speed: speed_t) -> c_int {
  + //TODO
  + platform::errno = errno::EINVAL;
  + -1
  +}
  +
  #[no_mangle]
  pub unsafe extern "C" fn tcflush(fd: c_int, queue: c_int) -> c_int {
  sys_ioctl::ioctl(fd, sys_ioctl::TCFLSH, queue as *mut c_void)
  