Update setup-node-mavericks.bash

setup-node-mavericks.bash

@@ -45,7 +45,7 @@ if [ -n "${NODEJS_VER}" ]; then
   
   # When using .tar.gz
   mkdir -p ${NODEJS_UNTAR}/
-  sudo tar xf "${NODEJS_PKG}" -C "${NODEJS_UNTAR}/"
+  tar xf "${NODEJS_PKG}" -C "${NODEJS_UNTAR}/" --strip-components=1
   rm -f ${NODEJS_UNTAR}/{LICENSE,CHANGELOG.md,README.md}
   sudo rsync -a "${NODEJS_UNTAR}/" "$node_install_path/"