New review comment by Johnnynator on void-packages repository

https://github.com/void-linux/void-packages/pull/29605#discussion_r598265499

Comment:
```suggestion
	QT_QPA_PLATFORM=offscreen CTEST_OUTPUT_ON_FAILURE=TRUE \
		dbus-run-session ninja -C build test
```
move this to `do_check` instead of `pre_check`

Also you will probably need at least `gnupg2 dbus` in `checkdepends`