Fix the local build for external platform in case of light example

examples/light/sdkconfig.defaults.ext_plat

@@ -0,0 +1,59 @@
+# Default to 921600 baud when flashing and monitoring device
+CONFIG_ESPTOOLPY_BAUD_921600B=y
+CONFIG_ESPTOOLPY_BAUD=921600
+CONFIG_ESPTOOLPY_COMPRESSED=y
+CONFIG_ESPTOOLPY_MONITOR_BAUD_115200B=y
+CONFIG_ESPTOOLPY_MONITOR_BAUD=115200
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+
+#enable BT
+CONFIG_BT_ENABLED=y
+CONFIG_BT_NIMBLE_ENABLED=y
+
+#disable BT connection reattempt
+CONFIG_BT_NIMBLE_ENABLE_CONN_REATTEMPT=n
+
+#enable lwip ipv6 autoconfig
+CONFIG_LWIP_IPV6_AUTOCONFIG=y
+
+# Use a custom partition table
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
+
+# Disable chip shell
+CONFIG_ENABLE_CHIP_SHELL=n
+
+# Disable chip tests
+CONFIG_BUILD_CHIP_TESTS=n
+
+#enable lwIP route hooks
+CONFIG_LWIP_HOOK_IP6_ROUTE_DEFAULT=y
+CONFIG_LWIP_HOOK_ND6_GET_GW_DEFAULT=y
+
+# Button
+CONFIG_BUTTON_PERIOD_TIME_MS=20
+CONFIG_BUTTON_LONG_PRESS_TIME_MS=5000
+
+# External Platform
+CONFIG_CHIP_ENABLE_EXTERNAL_PLATFORM=y
+CONFIG_CHIP_EXTERNAL_PLATFORM_DIR="../../../../../platform/ESP32_custom"
+CONFIG_CHIP_EXTERNAL_PLATFORM_INCLUDE_DIR="../../../../.."
+
+# disable softap by default
+CONFIG_ESP_WIFI_SOFTAP_SUPPORT=n
+
+# Disable DS Peripheral
+CONFIG_ESP_SECURE_CERT_DS_PERIPHERAL=n
+
+# Enable HKDF in mbedtls
+CONFIG_MBEDTLS_HKDF_C=y
+
+# ESP32-DevKit Settings
+# Buttons
+CONFIG_BSP_BUTTONS_NUM=1
+CONFIG_BSP_BUTTON_1_TYPE_GPIO=y
+CONFIG_BSP_BUTTON_1_GPIO=0
+CONFIG_BSP_BUTTON_1_LEVEL=0
+# LEDs
+CONFIG_BSP_LEDS_NUM=0
+