message: Untar into the right dir when verifying
  We'd previously dump it in the package's directory which is wrong when
  working in a workspace.
  Closes
diff: @@ -82,7 +82,7 @@ pub fn package(ws: &Workspace,
  })?;
  if opts.verify {
  dst.seek(SeekFrom::Start(0))?;
  - run_verify(ws, dst.file(), opts).chain_err(|| {
  + run_verify(ws, &dst, opts).chain_err(|| {
  "failed to verify package tarball"
  })?
  }
  @@ -276,15 +276,14 @@ fn tar(ws: &Workspace,
  Ok(())
  }
  -fn run_verify(ws: &Workspace, tar: &File, opts: &PackageOpts) -> CargoResult<()> {
  +fn run_verify(ws: &Workspace, tar: &FileLock, opts: &PackageOpts) -> CargoResult<()> {
  let config = ws.config();
  let pkg = ws.current()?;
  config.shell().status("Verifying", pkg)?;
  - let f = GzDecoder::new(tar)?;
  - let dst = pkg.root().join(&format!("target/package/{}-{}",
  - pkg.name(), pkg.version()));
  + let f = GzDecoder::new(tar.file())?;
  + let dst = tar.parent().join(&format!("{}-{}", pkg.name(), pkg.version()));
  if fs::metadata(&dst).is_ok() {
  fs::remove_dir_all(&dst)?;
  }
  