Make sure to get the required vars for the config.guess/et.al. family

first. Right now, this is semi-duplicated, since APR does the same.
PR:
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85704 13f79535-47bb-0310-9956-ffa450edef68