fix make zplugins script

scripts/make_zplugins.sh.in

@@ -24,6 +24,7 @@ rm -rf $out_file
 mkdir -p $private_dir
 mkdir -p $out_file
 tar xf $tarball -C $private_dir
+mv $private_dir/zplugins $private_dir/$inner_dir_name
 pushd $private_dir/$inner_dir_name
 meson_opts="--prefix=/"
 if [[ "$distro" == "osx-brew"* ]]; then