allow apxs to be run from the source tree, before installation (e.g. perl...

allow apxs to be run from the source tree, before installation (e.g. perl ../apache-2.0/src/support/apxs -q CFLAGS)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85693 13f79535-47bb-0310-9956-ffa450edef68