add nimble mesh example

need meshctl installed on raspberrypi. nimble offical samples have a lot of pit ...

examples/nimble_mesh_models_example_2/storage.h

@@ -0,0 +1,47 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/* Bluetooth: Mesh Generic OnOff, Generic Level, Lighting & Vendor Models
+ *
+ * Copyright (c) 2018 Vikrant More
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _STORAGE_H
+#define _STORAGE_H
+
+enum ps_variables_id {
+	RESET_COUNTER = 0x01,
+	GEN_DEF_TRANS_TIME_STATE,
+	GEN_ONPOWERUP_STATE,
+	LIGHTNESS_TEMP_DEF_STATE,
+	LIGHTNESS_TEMP_LAST_STATE,
+	LIGHTNESS_RANGE,
+	TEMPERATURE_RANGE
+};
+
+extern u8_t reset_counter;
+
+extern struct ble_npl_callout storage_work;
+
+int ps_settings_init(void);
+void save_on_flash(u8_t id);
+
+#endif