* build/generator/gen_win.py
  (get_win_includes,
   get_win_lib_dirs): Add openssl locations when available.
   
  (_find_serf): Detect openssl location layout. Based on the code on trunk.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x-openssl-dirs@1535139 13f79535-47bb-0310-9956-ffa450edef68