merge this fix into 2.0.46-dev:

  Fix a build problem with passing unsupported --enable-layout
  args to apr and apr-util.  This broke binbuild.sh as well as
  user-specified layout parameters.  PR 18649 [Justin Erenkrantz,
  Jeff Trawick]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@99398 13f79535-47bb-0310-9956-ffa450edef68