Handle non-type template parameter

[csordasmarton]

We should handle non-type template parameters in cpp parser:

template<typename T, int param> // param is a NonTypeTemplateParmDecl
bool f() {
  if (param < 0) // NonTypeTemplateParm
    return false;
  return true;
}

[mcserep]

We shall verify whether this issue still persists or not.