[Rpm-maint] [rpm-software-management/rpm] Add ternary operator support to expression parser (#838)

[pavlinamv]

@mlschroe: Thank you. The PR looks good to me.

@pmatilai After the mentioned example there is a list of operators that can be used in a condition after
```
%if
```

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/rpm-software-management/rpm/pull/838#issuecomment-532644399
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rpm.org/pipermail/rpm-maint/attachments/20190918/0be84e9f/attachment.html>