message: js: fix build of SIMD tests
diff: #include "opencv2/ts.hpp"
  #include <opencv2/core/utils/logger.hpp>
  #include "opencv2/core/utility.hpp"
  +#if !defined(__EMSCRIPTEN__)
  #include "opencv2/core/private.hpp"
  +#endif
  #ifdef GTEST_LINKED_AS_SHARED_LIBRARY
  #error ts module should not have GTEST_LINKED_AS_SHARED_LIBRARY defined
  