[Vulkan] Remove potential wrong VkPipelineStageFlags.
[Vulkan] Remove potential wrong VkPipelineStageFlags.

- VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT of srcStageMask may accidentally change the VkImageLayout before rendering finished.

yorung/AdamasFramework,yorung/AdamasFramework,yorung/AdamasFramework