Update the old layout of swapchain images

The swapchain image is already used as the resolve target with the general image layout, after that we should specify the old layout as VK_IMAGE_LAYOUT_GENERAL instead of VK_IMAGE_LAYOUT_UNDEFINED.

Author: wenqingli

examples/dynamicrenderingmultisampling/dynamicrenderingmultisampling.cpp

@@ -261,7 +261,7 @@ class VulkanExample : public VulkanExampleBase
 				swapChain.images[i],
 				VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
 				0,
-				VK_IMAGE_LAYOUT_UNDEFINED,
+				VK_IMAGE_LAYOUT_GENERAL,
 				VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
 				VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
 				VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,