message: fix google benchmark with emscripten (workaround)
diff: @@ -344,6 +344,7 @@ inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
  }
  // FIXME Add ClobberMemory() for non-gnu and non-msvc compilers
  +inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() { /* FIXME: this doesn't do anything */ }
  #endif
  // This class is used for user-defined counters.
  