Do not preserve ownership, times, etc. when copying repository

releng/org.eclipse.rap.incubator.releng/scripts/build.sh

diff --git a/releng/org.eclipse.rap.incubator.releng/scripts/build.sh b/releng/org.eclipse.rap.incubator.releng/scripts/build.sh
index 352e6a2..e597d29 100755
--- a/releng/org.eclipse.rap.incubator.releng/scripts/build.sh
+++ b/releng/org.eclipse.rap.incubator.releng/scripts/build.sh
@@ -100,7 +100,7 @@
 fi
 mkdir -p ${COMPONENT_DIRECTORY}
 cd ${COMPONENT_DIRECTORY}
-cp -a ${REPOSITORY_DIRECTORY} ${COMPONENT_DIRECTORY}/${TIMESTAMP}
+cp -r ${REPOSITORY_DIRECTORY} ${COMPONENT_DIRECTORY}/${TIMESTAMP}
 
 ######################################################################
 # clean-up target location