Fix typo in lib/heat

With the change https://review.openstack.org/43006 a typo was
introduced. This change fixes it.

Change-Id: Iebcbfe49d779552c17f6ab216976149f332b772c
diff --git a/lib/heat b/lib/heat
index ac76916..ff9473e 100644
--- a/lib/heat
+++ b/lib/heat
@@ -1,4 +1,4 @@
-etup lib/heat
+# lib/heat
 # Install and start **Heat** service
 
 # To enable, add the following to localrc