ld: warning: -bind_at_load is deprecated on macOS

```
  CXXLD    src/libbitcoin-system.la
  CXXLD    examples/libbitcoin-system-examples
ld: warning: -bind_at_load is deprecated on macOS
/Applications/Xcode_15.0.1.app/Contents/Developer/usr/bin/make  test/libbitcoin-system-test
```
https://github.com/libbitcoin/libbitcoin-system/actions/runs/9683416770/job/26718812953#step:9:741