Bug#801512: kblackbox build-depends on libkdegames-dev (>= 4:14.12.2) which is no longer built.

[peter green <plugwash@p10link.net>]

Package: kblackbox
Version: 4:15.08.0-1
Severity: serious
Tags: patch

kblackbox build-depends on libkdegames-dev (>= 4:14.12.2) . 
libkdegames-dev is no longer build by the kdegames source package.

In raspbian stretch simply changing the build-dep resulted in a 
successful build, I assume it will in Debian too.