- forgot to provide a default config for 1.6.1

  Thanks to Cristian Ionescu-Idbohrn for noticing this.

package/busybox/Config.in

@@ -100,6 +100,7 @@ config BR2_PACKAGE_BUSYBOX_CONFIG
 	default "package/busybox/busybox-1.5.0.config" if BR2_BUSYBOX_VERSION_1_5_0
 	default "package/busybox/busybox-1.5.0.config" if BR2_BUSYBOX_VERSION_1_5_1
 	default "package/busybox/busybox-1.6.0.config" if BR2_BUSYBOX_VERSION_1_6_0
+	default "package/busybox/busybox-1.6.0.config" if BR2_BUSYBOX_VERSION_1_6_1
 	help
 	  Some people may wish to use their own modified BusyBox configuration
 	  file, and will specify their config file location with this option.