[OpenGL] shapes.pir: faster float4 packing
[OpenGL] shapes.pir: faster float4 packing

* Switch to fastest float4 packing method from float4.pir benchmark


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@28308 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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