Add test I forgot to git add

Author: nikic

Zend/tests/first_class_callable_optimization.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Check interaction of first-class callables with optimization
+--FILE--
+<?php
+
+function test1() {}
+function test2() { return 42; }
+
+var_dump(test1(...));
+var_dump(test2(...));
+
+?>
+--EXPECT--
+object(Closure)#1 (0) {
+}
+object(Closure)#1 (0) {
+}