win32.c: ELOOP by _wopen
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32.c: ELOOP by _wopen
EINVAL is returned by _wopen of vc runtime.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e