60 sec is not enough at all

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_io.rb

@@ -3808,7 +3808,7 @@ __END__
       wset = [w]
       Thread.new { IO.select(rset, wset, nil, 0) }.join
     end;
-      200_000.times do
+      20_000.times do
         th = Thread.new { IO.select(rset, wset) }
         Thread.pass until th.stop?
         th.kill