vk/image: Don't abort when creating stencil image views

When creating a stencil image view, log a FINISHME but don't abort.
We're sooooo close to having this working.

src/vulkan/anv_image.c

@@ -492,7 +492,6 @@ anv_image_get_surface_for_aspect(struct anv_image *image, VkImageAspect aspect)
    case VK_IMAGE_ASPECT_STENCIL:
       assert(image->format->has_stencil);
       anv_finishme("stencil image views");
-      abort();
       return &image->stencil_surface;
     default:
        unreachable("image does not have aspect");