Add one more test

Author: JsonFreeman

tests/baselines/reference/for-of56.js

@@ -0,0 +1,5 @@
+//// [for-of56.ts]
+for (var let of []) {}
+
+//// [for-of56.js]
+for (var let of []) { }

tests/baselines/reference/for-of56.types

@@ -0,0 +1,5 @@
+=== tests/cases/conformance/es6/for-ofStatements/for-of56.ts ===
+for (var let of []) {}
+>let : any
+>[] : undefined[]
+

tests/cases/conformance/es6/for-ofStatements/for-of56.ts

@@ -0,0 +1,2 @@
+//@target: ES6
+for (var let of []) {}