fix bug of package arm

 #!/bin/bash
 #!/bin/bash
-bash package.sh arm
 
 
+echo "argv[0]=$0"
+if [[ ! -f $0 ]]; then 
+    echo "directly execute the scripts on shell.";
+    work_dir=`pwd`
+else 
+    echo "execute scripts in file: $0";
+    work_dir=`dirname $0`; work_dir=`(cd ${work_dir} && pwd)`
+fi
+
+bash ${work_dir}/package.sh arm