Add -R flag to apachectl for binary builds to work around lack of absolute

path to ./libexec directory for SHARED_CORE architectures that need to
load libhttp.ep.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83659 13f79535-47bb-0310-9956-ffa450edef68