add option --keep-inp-out-in-metal

src/llama.cpp

@@ -19773,6 +19773,7 @@ struct llama_model_params llama_model_default_params() {
         /*.use_mmap                    =*/ true,
         /*.use_mlock                   =*/ false,
         /*.check_tensors               =*/ false,
+        /*.keep_inp_out_in_metal       =*/ false,
     };
 
 #ifdef GGML_USE_METAL