message: tests: don't memfry when running address sanitizer
  That was the real problem with Logger.
diff: @@ -215,7 +215,15 @@ static \
  void \
  Name##_impl() \
  -# ifndef ELLE_TEST_NO_MEMFRY
  +
  +
  +// Clang defines _FORTIFY_SOURCE when given -fsanitize=address, and it
  +// does not like what we do here.
  +#if defined _FORTIFY_SOURCE
  +# define ELLE_TEST_NO_MEMFRY 1
  +#endif
  +
  +# if !defined ELLE_TEST_NO_MEMFRY
  // Apple clang-703.0.29 doesn't like using an offset of size_t.
  static const int _memfry_offset = 2 * sizeof(std::size_t);
  