Revert r422298, because it introduces GNU Make specific extensions to the...

Revert r422298, because it introduces GNU Make specific extensions to the Makefile, and should be replaced by doing the work inside configure, instead of the Makefile.in.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@422925 13f79535-47bb-0310-9956-ffa450edef68