Following up on r1546814, fix pool argument ordering. 

Note that all current callers pass the same value for both arguments.

* subversion/libsvn_subr/config_impl.h
* subversion/libsvn_subr/config_win.c
  (svn_config__win_config_path): Update arguments.
  
Found by: danielsh


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1546937 13f79535-47bb-0310-9956-ffa450edef68