Update node_setup.sh

fix source code path to newest

Author: couldtt

node_setup.sh

@@ -42,7 +42,7 @@ if [ -f $NODE_TAR ]; then
 	echo 'found'
 else
 	echo "download $NODE_VERSION..."
-	wget http://nodejs.org/dist/${NODE_TAR}
+	wget http://nodejs.org/dist/v$1/${NODE_TAR}
 fi
 
 tar -zxvf $NODE_TAR