improve promote script to use rsync instead of cp

releng.control/promote.sh

@@ -163,7 +163,7 @@ then
     do 	
      rsync -${rsyncArgs} ${FROMDIR} ${TODIR}
      exitCode=$?
-     if [ ! ( exitCode == 0 ) ]
+     if [ exitCode != 0 ]
      then
 	     nTrys=$(( nTrys + 1 ))
 	     if [ $verboseFlag ]