fix the example apxs -i invocation to work with the Apache 2.0 build

mechanism

PR:               12151
Submitted by:	  god@ogmc.ru
Reviewed by:	  Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96567 13f79535-47bb-0310-9956-ffa450edef68