add traceur test suite

test/fixtures/traceur/Classes/ClassNameInStack.js

@@ -0,0 +1,29 @@
+class MyClassName {
+  m() {
+    throw new Error();
+  }
+}
+
+try {
+  new MyClassName().m();
+  fail('Should have thrown');
+} catch (ex) {
+  if (ex.stack)
+    assert.isTrue(String(ex.stack).indexOf('MyClassName') >= 0);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+class MySecondClass extends MyClassName{
+  m() {
+    throw new Error();
+  }
+}
+
+try {
+  new MySecondClass().m();
+  fail('Should have thrown');
+} catch (ex) {
+  if (ex.stack)
+    assert.isTrue(String(ex.stack).indexOf('MySecondClass') >= 0);
+}