Extend dependecy boolean sytax to match RPM's recent additions

[kdeugau]

As per Neal Gompa:

Hey,

So as of today, RPM 4.13 has finalized its syntax for "boolean
dependencies". This is dependency logic that allows for conditional
evaluation of dependencies to pick the correct mix within a transaction.
This means that conditional logic for translating from RPM
Requires/Recommends/Suggests/Conflicts should incorporate this.

The information is published on the rpm.org wiki
<​http://rpm.org/wiki/PackagerDocs/BooleanDependencies>.