fix the bindprocessor() code selection; we need to test for the

presence of the bindprocessor() function, not for sys/processor.h,
which exists on some systems that don't have bindprocessor()


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89352 13f79535-47bb-0310-9956-ffa450edef68