test-net-write-slow: increase the socket timeout period

In Windows the callbacks arrive in slightly different order. A bunch
of write operations complete immediately, and after that there is a
gap of a few hundred ms. This causes the timeout timer to fire, which
is not really warranted; the first few write operations just finished a
little quicker than expected.

test/simple/test-net-write-slow.js

@@ -32,7 +32,7 @@ buf.fill(0x61); // 'a'
 
 var server = net.createServer(function(socket) {
   socket.setNoDelay();
-  socket.setTimeout(200);
+  socket.setTimeout(1000);
   socket.on('timeout', function() {
     assert.fail('flushed: ' + flushed +
                 ', received: ' + received + '/' + SIZE * N);