io.c (io_fd_check_closed): prioritize cross-thread "stream closed"

This may fix failures from TestIO#test_recycled_fd_close because
interrupts may be missed due to TOCTOU in other places.

cf. http://ci.rvm.jp/results/trunk-nopara@silicon-docker/1475034

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65939 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

io.c

@@ -638,6 +638,7 @@ static void
 io_fd_check_closed(int fd)
 {
     if (fd < 0) {
+        rb_thread_check_ints(); /* check for ruby_error_stream_closed */
         rb_raise(rb_eIOError, closed_stream);
     }
 }