Skip this test on HHVM, as its DateTime class is ancient and behaves differently

Author: derickr

tests/bson/bson-utcdatetime-int-size.phpt

@@ -1,5 +1,7 @@
 --TEST--
 Test for UTCDateTime and integer parsing
+--SKIPIF--
+<?php if (defined("HHVM_VERSION_ID")) exit("skip HHVM implements only an older version of DateTime"); ?>
 --INI--
 date.timezone=UTC
 error_reporting=-1