fix working dir location

cros_reposync.sh

@@ -3,8 +3,14 @@
 #
 # enter working directory
 #
+
 _working_dir_name=$1
-_working_dir_name=${_working_dir_name::-1}
+
+if [ ${_working_dir_name: -1} = " " ]; then
+    #somehow there's a space char when expect argument
+    _working_dir_name=${_working_dir_name::-1}
+fi
+
 _mydir="$(pwd)"
 _parentdir="$(dirname "$_mydir")"
 _working_full_path="${_parentdir}/${_working_dir_name}"