lavapipe: moar @optimize
without enough nir optimizing, some shaders fail to reduce as they should, resulting in the wrong output
fixes dEQP-VK.graphicsfuzz.spv-stable-mergesort-flatten-selection-dead-continues
without enough nir optimizing, some shaders fail to reduce as they should, resulting in the wrong output
fixes dEQP-VK.graphicsfuzz.spv-stable-mergesort-flatten-selection-dead-continues