Add cp -r option to ${builddir_share}/omc/runtime/

Belonging to [master]:
  - #2593

Author: jschueller

Makefile.common

@@ -404,7 +404,7 @@ install: install-dirs
 	# man pages
 	# cp -p ${builddir_man}/man1/*.gz ${INSTALL_MANDIR}/man1/
 	# Shared data
-	cp -p ${builddir_share}/omc/*.* ${builddir_share}/omc/runtime ${INSTALL_SHAREDIR}/omc/
+	cp -rp ${builddir_share}/omc/*.* ${builddir_share}/omc/runtime ${INSTALL_SHAREDIR}/omc/
 	# Scripts
 	cp -rp ${builddir_share}/omc/scripts/*.* ${builddir_share}/omc/scripts/OpenTurns ${INSTALL_SHAREDIR}/omc/scripts
 	# Java