Fix quoted lambda warning from lexical-let

* lisp/emacs-lisp/cl.el (cl--function-convert): Quote the inner lambda
with `function', not `quote' (Bug #11357).

lisp/emacs-lisp/cl.el

@@ -364,7 +364,7 @@ The two cases that are handled are:
             `(list 'lambda '(&rest --cl-rest--)
                    ,@(cl-sublis sub (nreverse decls))
                    (list 'apply
-                         (list 'quote
+                         (list 'function
                                #'(lambda ,(append new (cadr f))
                                    ,@(cl-sublis sub body)))
                          ,@(nconc (mapcar (lambda (x) `(list 'quote ,x))