Make Edebug specification for 'cl-defstruct' more lenient.

For example, 'xref-item' uses the list form of ':noinline'.

* lisp/emacs-lisp/cl-macs.el (cl-defstruct): Accept ':noinline' and
':named' with an argument.
* test/lisp/emacs-lisp/cl-macs-tests.el (cl-defstruct/edebug): New
unit test.

lisp/emacs-lisp/cl-macs.el

@@ -2911,7 +2911,8 @@ To see the documentation for a defined struct type, use
                              [":include" symbolp &rest sexp] ;; Not finished.
                              [":print-function" sexp]
                              [":type" symbolp]
-                             [":named"]
+                             [":noinline" &optional sexp]
+                             [":named" &optional sexp]
                              [":initial-offset" natnump])])]
              [&optional stringp]
              ;; All the above is for the following def-form.