message: GAPI: Fix [-Wreturn-type] warning on standalone mac build
  added [[noreturn]] to standalone version of  GAPI_Assert
diff: namespace detail
  {
  - inline void assert_abort(const char* str, int line, const char* file, const char* func)
  + [[noreturn]] inline void assert_abort(const char* str, int line, const char* file, const char* func)
  {
  std::stringstream ss;
  ss << file << ":" << line << ": Assertion " << str << " in function " << func << " failed\n";
  