Fix release.sh

Change-Id: I2de79760756c6aa62d620b701f9ee54a95ea72a2
diff --git a/org.eclipse.userstorage.releng/hudson/release.sh b/org.eclipse.userstorage.releng/hudson/release.sh
index 3525583..b988b69 100644
--- a/org.eclipse.userstorage.releng/hudson/release.sh
+++ b/org.eclipse.userstorage.releng/hudson/release.sh
@@ -55,8 +55,7 @@
 
 echo "Promoting $DROPSRC"
 rm -rf $DROP
-mkdir $DROP
-cp -a $DROPSRC/ $DROP
+cp -a $DROPSRC $DROP
 $BASH $SCRIPTS/adjustArtifactRepository.sh \
   $DROP \
   $DROP \