message: Remove in-pass transitions in HelloCompute
  This isn't validated out yet.
diff: @@ -137,17 +137,17 @@ void frame() {
  GetNextFramebuffer(device, renderpass, swapchain, depthStencilView, &backbuffer, &framebuffer);
  nxt::CommandBuffer commands = device.CreateCommandBufferBuilder()
  + .TransitionBufferUsage(buffer, nxt::BufferUsageBit::Storage)
  .BeginComputePass()
  .SetComputePipeline(computePipeline)
  - .TransitionBufferUsage(buffer, nxt::BufferUsageBit::Storage)
  .SetBindGroup(0, computeBindGroup)
  .Dispatch(1, 1, 1)
  .EndComputePass()
  + .TransitionBufferUsage(buffer, nxt::BufferUsageBit::Uniform)
  .BeginRenderPass(renderpass, framebuffer)
  .BeginRenderSubpass()
  .SetRenderPipeline(renderPipeline)
  - .TransitionBufferUsage(buffer, nxt::BufferUsageBit::Uniform)
  .SetBindGroup(0, renderBindGroup)
  .DrawArrays(3, 1, 0, 0)
  .EndRenderSubpass()
  