Make stdin pollable on Windows

You can now play Super Mario Bros in CMD.EXE using Cosmopolitan! This is
thanks to a new worker thread that's spawned on Windows whenever any one
of poll(), select(), or ioctl(FIONREAD) is linked.

libc/sock/socketpair-nt.c

@@ -54,7 +54,7 @@ textwindows int sys_socketpair_nt(int family, int type, int proto, int sv[2]) {
     return eopnotsupp();
   }
 
-  CreatePipeName(pipename);
+  __create_pipe_name(pipename);
   __fds_lock();
   reader = __reservefd_unlocked(-1);
   writer = __reservefd_unlocked(-1);