Create destination directory during symlink install

ament_cmake_core/cmake/symlink_install/ament_cmake_symlink_install.cmake.in

@@ -55,6 +55,11 @@ function(ament_cmake_symlink_install_directory cmake_current_source_dir)
         # remove trailing slash
         string(SUBSTRING "${dir}" 0 ${offset} dir)
       endif()
+
+      # Create destination directory.
+      # This does *not* solve the problem of empty directories WITHIN the install tree,
+      # but does make sure that the top-level directory specified by the caller gets created.
+      file(MAKE_DIRECTORY "${destination}")
 
       # glob recursive files
       set(relative_files "")