- make sure the defaults in `cmake/cmake_extension.py` variable
`extra_cmake_args` can be overriden by `cmake_args` from
`SHERPA_ONNX_CMAKE_ARGS` env variable
- fix a bug in `sherpa-onnx/csrc/parse-options.cc` which appears
when using `-DSHERPA_ONNX_ENABLE_CHECK=ON`
- avoid copying binaries when these are disabled