org.el (orgstruct-setup): Add `org-ctrl-c-minus' and `org-ctrl-c-star'

* org.el (orgstruct-setup): Add `org-ctrl-c-minus' and
`org-ctrl-c-star'.

lisp/org.el

@@ -8751,6 +8751,8 @@ buffer.  It will also recognize item context in multiline items."
              org-backward-element
              org-backward-heading-same-level
              org-ctrl-c-ret
+	     org-ctrl-c-minus
+	     org-ctrl-c-star
              org-cycle
              org-forward-heading-same-level
              org-insert-heading