Fixed bug #67406 built-in web-server segfaults on startup

Reproduce on aarch64.

From select man page:
  "select() may update the timeout argument to indicate how much time was left."
So "const" is not ok.
NEWS
NEWS
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  NEWS
  Fixed bug #67406 built-in web-server segfaults on startup