[Scheme] Keep a stack of :outer subs. Reverse order of PIR subs generated by _op_lambda().
[Scheme]
Keep a stack of :outer subs.
Reverse order of PIR subs generated by _op_lambda().


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@22031 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot