switch back to using srclib/apr/build for AC_CONFIG_AUX_DIR so DSOs can be

built with libtool < 1.4.

This is expected to be temporary until the complete platform independent
APR-less build system can be integrated into the stable branch.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@98189 13f79535-47bb-0310-9956-ffa450edef68