obscure: start jitting from closure creation
obscure: start jitting from closure creation

this is mostly motivated by church numerals. There the unwinding of the
call stack and creation of closures for n->f was not jitted at all.

this might be solved by a more general form of reduce_prim_cont.

vishesh/pycket,magnusmorton/pycket,cderici/pycket,krono/pycket,samth/pycket,pycket/pycket,samth/pycket,cderici/pycket,pycket/pycket,vishesh/pycket,magnusmorton/pycket,krono/pycket,pycket/pycket,samth/pycket,vishesh/pycket,cderici/pycket,krono/pycket,magnusmorton/pycket