update support for orangepi_zero_2w

scripts/rootfs.sh

@@ -55,7 +55,7 @@ BUILD_ID="$distro_build_id"
 EOF
 
     busybox_rootfs
-    cp -v $build/busybox/busybox-1.36.1/busybox $rootfspath/usr/bin # &>> $fulllogfile
+    cp -v $build/busybox/busybox-${BUSYBOX_VERSION}/busybox $rootfspath/usr/bin # &>> $fulllogfile
     cd $rootfspath/usr/bin
     for i in $(cat $BUSYBOX_LIST_FILE); do ln -sv busybox $i; done
     cp -v $root/rootfs/init.in $rootfspath/init
@@ -94,6 +94,8 @@ EOF
 EOF
     fi
 
+    [ ! -z "$ROOTFS_OVERLAY" ] && cp -rv $ROOTFS_OVERLAY/* $rootfspath
+
     chmod 640 $rootfspath/etc/shadow $rootfspath/etc/inittab
     chmod 755 $rootfspath/etc/init.d/* $rootfspath/usr/share/udhcpc/default.script $rootfspath/init
     chmod 644 $rootfspath/etc/{passwd,group,hostname,hosts,fstab,shells,issue} $rootfspath/etc/network/interfaces