New review comment by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/pull/40307#discussion_r1012396754

Comment:
this would be better as an if block below:

```bash
if [ -z "$XBPS_CHECK_PKGS" ]; then
	configure_args+=" -DLIB3MF_TESTS=OFF"
fi
```
however, I don't think it will affect the final build if the tests are always built