Add missing scripts for rootfs creation

scripts/create-package.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+TOPDIR=`pwd`
+PRODUCT_NAME=generic_arm64
+OUTDIR=out/target/product/$PRODUCT_NAME
+
+if [ -d rootfs ] ; then
+	rm -rf rootfs
+fi
+
+mkdir rootfs
+cp -r $OUTDIR/root/* rootfs/
+cp -r $OUTDIR/system/* rootfs/system/
+
+mkdir rootfs/cache
+
+cp filesystem_config.txt rootfs/
+cp anbox-init.sh rootfs/
+chmod +x rootfs/anbox-init.sh
+
+chmod 755 rootfs/init.*
+chmod 755 rootfs/default.prop
+chmod 755 rootfs/system/build.prop
+chmod +x rootfs/anbox-init.sh
+
+tar cf rootfs.tar rootfs