-- v2: vkd3d-shader/hlsl: Define lit() in HLSL. vkd3d-shader/hlsl: Define smoothstep() in HLSL. vkd3d-shader/hlsl: Store the internal name counter in struct hlsl_ctx. vkd3d-shader/hlsl: Separate an add_user_call() helper. vkd3d-shader/hlsl: Introduce an hlsl_sprintf_alloc() helper.