add link to bind-key

diff --git a/emacs_el/bind-key.el b/emacs_el/bind-key.el
new file mode 120000 (symlink)
index 0000000..7218b47
--- /dev/null
+++ b/emacs_el/bind-key.el
@@ -0,0 +1 @@
+use-package/bind-key.el
\ No newline at end of file