add additional react ThisExpression conversion test

test/fixtures/transformation/react/arrow-functions/actual.js

@@ -1,3 +1,7 @@
 var foo = function () {
   return () => <this />;
 };
+
+var bar = function () {
+  return () => <this.foo />;
+};

test/fixtures/transformation/react/arrow-functions/expected.js

@@ -4,3 +4,10 @@ var foo = function () {
     return React.createElement(_this, null);
   };
 };
+
+var bar = function () {
+  var _this = this;
+  return function () {
+    return React.createElement(_this.foo, null);
+  };
+};