Bug#805437: light-locker build-depends unsatisfiable in testing and only satisfiable using cruft packages in unstable

[peter green]

Package: light-locker
Severity: serious

The latest upload of light-locker added a build-dependency on 
libsystemd-login-dev .

libsystemd-login-dev is no longer built by the systemd source package 
and is not available in testing.