minor fix of comments

releng.control/sendPromoteMail.sh

@@ -9,13 +9,13 @@ fi
 TODIR=$2
 if [ -z $TODIR ]
 then
-    echo "must provide TODIR name as first argumnet"
+    echo "must provide TODIR name as second argumnet"
     exit 8;
 fi
 DROPDIR=$3
 if [ -z $DROPDIR ]
 then
-    echo "must provide DROPDIR name as first argumnet"
+    echo "must provide DROPDIR name as third argumnet"
     exit 7;
 fi