added gatt_server_notif_switch resource files

gatt_server_notif_switch/Makefile

+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := gatt_server_demos
+
+COMPONENT_ADD_INCLUDEDIRS := components/include
+
+include $(IDF_PATH)/make/project.mk

gatt_server_notif_switch/README.md

+# gatt_server_notif_switch
+A sample program for ESP32 on esp-idf. This program send notification by push or release GPIO0 switch.
+
+# Partner program
+The following nodejs program can listen notice from this project.
+
+- [esp32-nodejs-samples/listen-notification.js](https://github.com/asukiaaa/esp32-nodejs-samples/blob/master/listen-notification.js)
+- [gatt_client_listen_notif_then_output_to_led](../gatt_client_listen_notif_then_output_to_led)
+
+# License
+Appache v2
+
+# References
+- [esp-idf/examples/bluetooth/gatt_server](https://github.com/espressif/esp-idf/tree/master/examples/bluetooth/gatt_server)
+- [esp-idf/examples/peripherals/gpio/](https://github.com/espressif/esp-idf/tree/master/examples/peripherals/gpio)
+- [GATT SERVER API: esp_ble_gatts_send_indicate](http://esp-idf.readthedocs.io/en/latest/api/bluetooth/esp_gatts.html#_CPPv227esp_ble_gatts_send_indicate13esp_gatt_if_t8uint16_t8uint16_t8uint16_tP7uint8_tb)
+- [ESP32からBLE GATTのnotifを発信し、nodejs(noble)で受信する方法](http://asukiaaa.blogspot.com/2017/04/esp32ble-gattnodejsnoble.html)
\ No newline at end of file

gatt_server_notif_switch/main/Kconfig

+menu "Example 'GATT SERVER' Config"
+
+config SET_RAW_ADV_DATA
+    bool "Use raw data for advertising packets and scan response data"
+    help
+        If this config item is set, raw binary data will be used to generate advertising & scan response data.
+        This option uses the esp_ble_gap_config_adv_data_raw() and esp_ble_gap_config_scan_rsp_data_raw() functions.
+
+        If this config item is unset, advertising & scan response data is provided via a higher-level esp_ble_adv_data_t structure.
+        The lower layer will generate the BLE packets. This option has higher overhead at runtime.
+
+endmenu

gatt_server_notif_switch/main/component.mk

+#
+# Main Makefile. This is basically the same as a component makefile.
+#
+# This Makefile should, at the very least, just include $(SDK_PATH)/make/component_common.mk. By default,
+# this will take the sources in the src/ directory, compile them and link them into
+# lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
+# please read the ESP-IDF documents if you need to do this.
+#

gatt_server_notif_switch/sdkconfig.defaults

+# Override some defaults so BT stack is enabled
+# and WiFi disabled by default in this example
+CONFIG_BT_ENABLED=y
+CONFIG_WIFI_ENABLED=n