- Copy also the directories

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@12585 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Author: sjoelund

Makefile.common

@@ -204,7 +204,7 @@ install: install-dirs install-python
 	# Libraries
 	cp -rp ${builddir_lib}/* ${INSTALL_LIBDIR}
 	# Includes
-	cp -p ${builddir_inc}/* ${INSTALL_INCLUDEDIR}
+	cp -rp ${builddir_inc}/* ${INSTALL_INCLUDEDIR}
 	# License
 	cp -p COPYING ${INSTALL_DOCDIR}/omc/
 	# Documents