Store layers in VRAM

ggml.c

@@ -4711,6 +4711,7 @@ struct ggml_tensor * ggml_new_tensor_impl(
 
     *result = (struct ggml_tensor) {
         /*.type         =*/ type,
+        /*.backend      =*/ GGML_BACKEND_CPU,
         /*.n_dims       =*/ n_dims,
         /*.ne           =*/ { 1, 1, 1, 1 },
         /*.nb           =*/ { 0, 0, 0, 0 },