Don't overwrite dll_ext

git-svn-id: http://hxcpp.googlecode.com/svn/trunk@668 d391954c-4287-11de-baa7-5503b21fc9cb
socket_poll_events always returns null

git-svn-id: http://hxcpp.googlecode.com/svn/trunk@669 d391954c-4287-11de-baa7-5503b21fc9cb
Update socket_poll binary

git-svn-id: http://hxcpp.googlecode.com/svn/trunk@670 d391954c-4287-11de-baa7-5503b21fc9cb