message: Force depth writes when fetching shader output in pixel history
  * If depth is disabled this will do nothing, but if depth is enabled this
  ensures we actually get the depth value from the fragment.
diff: @@ -2567,6 +2567,7 @@ struct VulkanPixelHistoryPerFragmentCallback : VulkanPixelHistoryCallback
  {
  ds->depthBoundsTestEnable = VK_FALSE;
  + ds->depthWriteEnable = VK_TRUE;
  ds->depthCompareOp = VK_COMPARE_OP_ALWAYS;
  }
  