Apache modules don't install correctly as part of 'make install-tools'
so move mod_dontdothat to the default build and 'make install'.

* build.conf
  (mod_dontdothat): Change install to apache-mod.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1454450 13f79535-47bb-0310-9956-ffa450edef68