message: Add spec-required features in 1.2 features struct
  * If we add this struct to enable buffer device address we must also enable any
  other features the spec requires.
diff: @@ -2793,6 +2793,22 @@ bool WrappedVulkan::Serialise_vkCreateDevice(SerialiserType &ser, VkPhysicalDevi
  {
  vk12Features.bufferDeviceAddress = VK_TRUE;
  + // enable any features that the spec requires
  + if(Extensions.contains(VK_KHR_DRAW_INDIRECT_COUNT_EXTENSION_NAME))
  + vk12Features.drawIndirectCount = VK_TRUE;
  +
  + if(Extensions.contains(VK_KHR_SAMPLER_MIRROR_CLAMP_TO_EDGE_EXTENSION_NAME))
  + vk12Features.samplerMirrorClampToEdge = VK_TRUE;
  +
  + if(Extensions.contains(VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME))
  + vk12Features.descriptorIndexing = VK_TRUE;
  +
  + if(Extensions.contains(VK_EXT_SAMPLER_FILTER_MINMAX_EXTENSION_NAME))
  + vk12Features.samplerFilterMinmax = VK_TRUE;
  +
  + if(Extensions.contains(VK_EXT_SHADER_VIEWPORT_INDEX_LAYER_EXTENSION_NAME))
  + vk12Features.shaderOutputLayer = VK_TRUE;
  +
  vk12Features.pNext = (void *)createInfo.pNext;
  createInfo.pNext = &vk12Features;
  }
  