vm_insnhelper.c: allow to_ary

* vm_insnhelper.c (vm_callee_setup_arg{_complex,}): try conversion
  by to_ary for a lambda, as well as a proc.
  [ruby-core:65887] [Bug #9605]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e