ob-lisp: adding to the Makefile for inclusion into products of the repository

* Makefile (LISPF): Adding to the Makefile for inclusion into products
  of the repository.

Makefile

@@ -135,6 +135,7 @@ LISPF      = 	org.el			\
 		ob-dot.el		\
 		ob-mscgen.el		\
 		ob-latex.el		\
+		ob-lisp.el		\
 		ob-ledger.el		\
 		ob-python.el		\
 		ob-sql.el		\