Ruby

win32.c: support known reparse points only

• dir.c (replace_real_basename), win32/win32.c (opendir_internal):
  check reparse point tags and treat supported tags only as
  symbolic links. [ruby-core:70454] [Bug #11462]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51644 b2dd03c8-39d4-4d8f-98ff-823fe69b080e