Skip one more imap test under asan

Wondering if the error just moves to a different test each time
we skip one?

Author: nikic

ext/imap/tests/imap_open_error.phpt

@@ -6,6 +6,7 @@ Paul Sohier
 --SKIPIF--
 <?php
 require_once(__DIR__.'/skipif.inc');
+if (getenv("SKIP_ASAN")) die("skip leak sanitizer crashes");
 ?>
 --FILE--
 <?php