Fix pWaitDstStageMask in vkQueueSubmit

[cforfang]

To make sure the image acquired semaphore is signaled before any pixels are rendered to the swapchain image we need to wait at VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT instead of VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT.

[DustinHLand]

Thanks Christian 👍