esp8266/scripts/_boot: Print notice when initial setup is executed.

esp8266/scripts/_boot.py

@@ -8,6 +8,7 @@ try:
 except OSError:
     import inisetup
     inisetup.check_bootsec()
+    print("Performing initial setup")
     uos.VfsFat.mkfs(bdev)
     vfs = uos.VfsFat(bdev, "")
     inisetup.wifi()