message: Support newer version of emscripten.
diff: @@ -749,6 +749,10 @@ Word ___cxa_uncaught_exceptionHandler(void*) {
  throw WasmException("emscripten cxa_uncaught_exception");
  }
  +Word ___cxa_uncaught_exceptionsHandler(void*) {
  + throw WasmException("emscripten cxa_uncaught_exceptions");
  +}
  +
  Word ___clock_gettimeHandler(void*, Word, Word) { throw WasmException("emscripten clock_gettime"); }
  void ___lockHandler(void*, Word) { throw WasmException("emscripten lock"); }
  @@ -1834,6 +1838,7 @@ void Wasm::registerCallbacks() {
  _REGISTER(___cxa_pure_virtual);
  _REGISTER(___cxa_allocate_exception);
  _REGISTER(___cxa_uncaught_exception);
  + _REGISTER(___cxa_uncaught_exceptions);
  _REGISTER(___call_main);
  _REGISTER(___clock_gettime);
  _REGISTER(___lock);
  