Step1: build with busybox.

Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>

package/prepare-env/make.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/bash
+source $(dirname "$0")/../common.sh
+
+mkdir -p ${BUILD_DIR}
+if [ -f ${BUILD_DIR}/build-time.log ]; then
+	touch ${BUILD_DIR}/build-time.log
+fi
+mkdir -p ${HOST_DIR}
+mkdir -p ${STAGING_DIR}
+ln -snf ${STAGING_DIR} ${OUTPUT_DIR}/staging
+mkdir -p ${TARGET_DIR}