Include apr_version.h to get the value of APR_MAJOR_VERSION
so that we don't go looking in <searchpath>/apr-APR_MAJOR_VERSION
for APU DSOs.


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1516839 13f79535-47bb-0310-9956-ffa450edef68