Also close @destination like the normal path

lib/paperclip/io_adapters/abstract_adapter.rb

@@ -64,6 +64,7 @@ module Paperclip
     rescue Errno::EXDEV, Errno::EPERM, Errno::ENOENT, Errno::EEXIST => e
       Paperclip.log("Link failed with #{e.message}; copying link #{src} to #{dest}")
       FileUtils.cp(src, dest)
+      @destination.close
       @destination.open.binmode
     end
   end