Add basu support

[muradm]

trafficstars

Add compiling and linking with basu

[muradm]

Searching for basu in repo originally didn't provided results. After submitting PR I see there is another similar one. Any way may stay here

[kennylevinsen]

Aren’t we only using dbus for the (e)logind integration, implying that their libs should be present when this feature is compiled in?

[emersion]

Closing, since there is no good explanation why this is desirable, and we're planning to drop logind support.