get "make extraclean" working for apr-util again

the apr-util build now depends on files in apr;
"make extraclean" in apr removes some of those files, causing
a subsequent "make extraclean" in apr-util to blow*; make in
apr-util first so we don't have this problem

*on some platforms make aborted; on others the error was
ignored though apr-util wasn't cleaned


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89825 13f79535-47bb-0310-9956-ffa450edef68