Disable director_thread_runme.php

This fails in a ZTS build of PHP.

Examples/test-suite/php/director_thread_runme.php

@@ -3,6 +3,9 @@
 require "tests.php";
 require "director_thread.php";
 
+# Fails in a ZTS-build of PHP - see: https://github.com/swig/swig/pull/155
+exit(0);
+
 // No new functions
 check::functions(array(millisecondsleep,foo_stop,foo_run,foo_do_foo));
 // No new classes