win32/resolv.rb: call rb_w32_osid
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61895 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32/resolv.rb: call rb_w32_osid
direct GetVersionExA API.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61895 b2dd03c8-39d4-4d8f-98ff-823fe69b080e