CGBASupport (#13)

* Start work on GBASupport

* Match update

* Almost perfect match

* Very close to 100% match

* Match & link CGBASupport

* Fix some naming

* use c-cstle cast and round-up

Former-commit-id: d8804b5244

include/rstl/rc_ptr.hpp

@@ -35,6 +35,7 @@ public:
   }
   T* operator->() const { return GetPtr(); }
   T& operator*() const { return *GetPtr(); }
+  operator bool() const { return GetPtr() != nullptr; }
 
 private:
   CRefData* x0_refData;