Add ecma_6 into spidermonkey vendortest

* Copy more files from es1 to run spidermonkey tests
* Add tools to run ECMA5-incompatible tests
  - [babel](https://babeljs.io/)
  - [es6-shim](https://github.com/paulmillr/es6-shim)
  - [es6-symbol](https://www.npmjs.com/package/es6-symbol)
* Add src/shell/GlobalObjectBuiltinTestFunctions.cpp to add test-only functions
* 'of' should be able to be used as identifier
* Set rpath of x86 binary relative to binary path
* Remove config.h.in~ file from repository
* Fix broken build by removing third_party/libunwind

src/shell/DefaultJobQueue.cpp

@@ -0,0 +1,17 @@
+#ifdef ESCARGOT_ENABLE_PROMISE
+
+#include "Escargot.h"
+#include "DefaultJobQueue.h"
+#include "runtime/Job.h"
+#include "runtime/Context.h"
+#include "runtime/SandBox.h"
+
+namespace Escargot {
+
+JobQueue* JobQueue::create()
+{
+    return DefaultJobQueue::create();
+}
+}
+
+#endif