add lisp packages

lisp/org/testing/examples/babel-dangerous.org

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+#+Title: dangerous code block examples which should be isolated
+#+OPTIONS: ^:nil
+
+* no default value for vars
+  :PROPERTIES:
+  :ID:       f2df5ba6-75fa-4e6b-8441-65ed84963627
+  :END:
+
+There is no default value assigned to =x= variable. This is not permitted
+anymore.
+
+#+name: carre
+#+begin_src python :var x
+  return x*x
+#+end_src