VK_KHR_incremental_present: Fix usage flags.

Besides swapchain support we also need
vkGetPhysicalDeviceImageFormatProperties support. Use just the
needed flags instead. As COLOR_ATTACHMENT is required in
VK_KHR_surface, we don't need to check for it.

Affected tests:

dEQP-VK.wsi.*.incremental_present.*

Components: Vulkan
VK-GL-CTS issue: 1395

Change-Id: I4dd0f95da0a8f31c11efe7ce58f12cfbe160a71e

external/vulkancts/modules/vulkan/wsi/vktWsiIncrementalPresentTests.cpp

@@ -966,7 +966,7 @@ std::vector<vk::VkSwapchainCreateInfoKHR> generateSwapchainConfigs (vk::VkSurfac
 																	vk::VkPresentModeKHR					presentMode)
 {
 	const deUint32							imageLayers			= 1u;
-	const vk::VkImageUsageFlags				imageUsage			= properties.supportedUsageFlags;
+	const vk::VkImageUsageFlags				imageUsage			= vk::VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 	const vk::VkBool32						clipped				= VK_FALSE;
 	vector<vk::VkSwapchainCreateInfoKHR>	createInfos;