New review comment by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/pull/37672#discussion_r906361505

Comment:
this can be turned into
```sh
make_check_pre="env PYTHONPATH=$wrksrc/build/lib"
make_check_args="--deselect=tests/downloaders/test_project_euclid.py::test_1"
make_check_target="papis tests"
```
and then defining do_check() is no longer needed