Fix the configure scripts, so that we don't try to substitute into

test/Makefile unless we actually have a test directory.  The problem
is that we don't distribute test directories with our tarballs, so our
configure script outputs error messages.  This fixes that problem.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88067 13f79535-47bb-0310-9956-ffa450edef68