Adds the vkReleaseSwapchainImagesEXT entrypoint in the WSI layer which
allows applications to release the acquired images back to the swapchain
without presenting them.
Change-Id: I52900547f95661e6ec40cb586b035da0ca2d266f
Signed-off-by: Normunds Rieksts <normunds.rieksts@arm.com>
Signed-off-by: Dennis Tsiang <dennis.tsiang@arm.com>
Signed-off-by: Fufu Fang <fufu.fang@arm.com>
