Follow-up to r1311469: fix build with older APRs
Follow-up to r1311469: fix build with older APRs

* subversion/libsvn_subr/config.c
  include compatibility header

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1311491 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion