Fix an OS X build error.
Fix an OS X build error.

* build.conf
  Add "undefined-lib-symbols = yes" to the mod_dav_svn and mod_authz_svn
  entries.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@849650 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion