[OpenGL] Convert shapes.pir to new export API
[OpenGL] Convert shapes.pir to new export API

* Convert examples/opengl/shapes.pir to use new OpenGL.pir
  function export API


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@28302 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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