message: Improved WASI path_readlink function signature
diff: @@ -1600,16 +1600,17 @@ pub fn path_open(
  pub fn path_readlink(
  ctx: &mut Ctx,
  - fd: __wasi_fd_t,
  + dir_fd: __wasi_fd_t,
  path: WasmPtr<u8, Array>,
  path_len: u32,
  - buf: WasmPtr<u8>,
  + buf: WasmPtr<u8, Array>,
  buf_len: u32,
  - bufused: WasmPtr<u32>,
  + buf_used: WasmPtr<u32>,
  ) -> __wasi_errno_t {
  debug!("wasi::path_readlink");
  unimplemented!("wasi::path_readlink")
  }
  +
  pub fn path_remove_directory(
  ctx: &mut Ctx,
  fd: __wasi_fd_t,
  