update root build shell script to fix decompress twice bug

guowenxue

2022-07-18 800948edf8c81cff38235947fe602b42d8125a63

 bsp/rootfs/files/wpa_supplicant.conf

@@ -3,7 +3,7 @@
update_config=1
 
network={
 scan_ssid=1
 ssid=""   
 psk=""
    scan_ssid=1
    ssid=""
    psk=""
}