Added missing quote on echo

Change-Id: I386974db4b758ffdb11ddce9a08c0a5742407e6c
diff --git a/vars/installVoltctl.groovy b/vars/installVoltctl.groovy
index 93963c3..fc983b4 100644
--- a/vars/installVoltctl.groovy
+++ b/vars/installVoltctl.groovy
@@ -62,7 +62,7 @@
       declare volt_cfg=\$HOME/.volt/config
 
       echo
-      echo "** Fixing perms: \$volt_cfg
+      echo "** Fixing perms: \$volt_cfg"
       mkdir -p \$volt_dir
       chmod -R u+w,go-rwx \$volt_dir
       chmod u=rwx \$volt_dir