Fix a make problem that occurred due to the removal of the other submakefiles....

Fix a make problem that occurred due to the removal of the other submakefiles.  Referencing example.nlm twice is just a hack to fix the problem for now.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@290836 13f79535-47bb-0310-9956-ffa450edef68