Increase select timeout in FPM tester

Let's see if that helps with the recent failure spree on Azure.

Author: nikic

sapi/fpm/tests/tester.inc

@@ -622,7 +622,7 @@ class Tester
         $read = [$this->outDesc];
         $write = null;
         $except = null;
-        if (stream_select($read, $write, $except, 3)) {
+        if (stream_select($read, $write, $except, $timeout=5)) {
             return fgets($this->outDesc);
         } else {
             return null;