Declaration of ap_reclaim_child_processes() in exports.c needs to be

conditional in the same way that the function's definition is so give it a
suitable macro that will be recogized by the scripts that make exports.c.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88537 13f79535-47bb-0310-9956-ffa450edef68