New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/11891#issuecomment-503643064
Comment:
Same problem in `qt5-tools_package()`:
```
if [ -e ${PKGDESTDIR}/usr/bin/${f}-qt5 ]; then
```

BTW I still did not find sufficient time to look closer at this PR.