wined3d: Request VK_KHR_external_memory on Vulkan 1.0.

dlls/wined3d/adapter_vk.c

@@ -1821,6 +1821,7 @@ static const struct
 vulkan_instance_extensions[] =
 {
     {VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME, VK_API_VERSION_1_1, FALSE},
+    {VK_KHR_EXTERNAL_MEMORY_EXTENSION_NAME,                  VK_API_VERSION_1_1, FALSE},
     {VK_KHR_SURFACE_EXTENSION_NAME,                          ~0u,                TRUE},
     {VK_KHR_WIN32_SURFACE_EXTENSION_NAME,                    ~0u,                TRUE},
 };