message: Fix a test failure in HashTests
  broke `HashTests` as it renamed a preprocessor definition.
diff: @@ -36,7 +36,7 @@ class HashTests
  for (const auto& t : tests)
  {
  const auto actual = til::hasher{ t.seed }.write(t.input).finalize();
  -#if defined(TIL_HASH_X86)
  +#if defined(TIL_HASH_32BIT)
  VERIFY_ARE_EQUAL(t.expected32, actual);
  #else
  VERIFY_ARE_EQUAL(t.expected64, actual);
  