Move a comment. No functional change.

* subversion/libsvn_wc/wc_db_update_move.c
  (get_tc_info): Move a comment asking about mixed-rev move src/dest to ...
  (svn_wc__db_update_moved_away_conflict_victim): ... this function.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1465614 13f79535-47bb-0310-9956-ffa450edef68