examples : adapt to metal API

whisper.cpp

@@ -1070,7 +1070,7 @@ static ggml_backend_t whisper_backend_init(const whisper_context_params & params
 #ifdef GGML_USE_METAL
     if (params.use_gpu) {
         WHISPER_LOG_INFO("%s: using Metal backend\n", __func__);
-        ggml_metal_log_set_callback(g_state.log_callback, g_state.log_callback_user_data);
+        ggml_backend_metal_log_set_callback(g_state.log_callback, g_state.log_callback_user_data);
         backend_gpu = ggml_backend_metal_init();
         if (!backend_gpu) {
             WHISPER_LOG_ERROR("%s: ggml_backend_metal_init() failed\n", __func__);