message: Fix a bug in eager FingerprintCat128
  The buggy version was ignoring the high 64 bits.
diff: @@ -184,7 +184,7 @@ namespace {
  inline tensorflow::Fprint128 FingerprintCat128(const tensorflow::Fprint128& a,
  const tensorflow::Fprint128& b) {
  return {tensorflow::FingerprintCat64(a.low64, b.low64),
  - tensorflow::FingerprintCat64(a.low64, b.low64)};
  + tensorflow::FingerprintCat64(a.high64, b.high64)};
  }
  void CombineUnordered(const tensorflow::Fprint128& a,
  