Skip 64-bit specific date test on 32-bit

Author: iluuu1994

ext/date/tests/gh-124.phpt

@@ -2,6 +2,8 @@
 Test for timelib #124: Problem with large negative timestamps
 --INI--
 date.timezone=UTC
+--SKIPIF--
+<?php if (PHP_INT_SIZE != 8) echo "skip this test is for 64-bit only"; ?>
 --FILE--
 <?php
 var_dump((new DateTime("@-9223372036854775808"))->getTimestamp());