Fix typo: falure => failure

Change-Id: Ic1a53eec71d5e20194505aa8655a99b2fedd7632
diff --git a/functions-common b/functions-common
index f6a5253..16abb65 100644
--- a/functions-common
+++ b/functions-common
@@ -1453,7 +1453,7 @@
         return
     fi
 
-    # Check if there is any falure flag file under $SERVICE_DIR/$SCREEN_NAME
+    # Check if there is any failure flag file under $SERVICE_DIR/$SCREEN_NAME
     # make this -o errexit safe
     failures=`ls "$SERVICE_DIR/$SCREEN_NAME"/*.failure 2>/dev/null || /bin/true`