Merge branch 'master' into core-updates

gnu: gnubik: Synchornize synopsis and description.

* gnu/packages/games.scm (gnubik): Synchornize synopsis and description.

Merge branch 'master' into core-updates

gnu: games: Add new package gnubg

* gnu/packages/games.scm (gnubg): New variable

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: games: New module

* gnu/packages/games.scm (gnubik): New variable

Signed-off-by: Ludovic Courtès <ludo@gnu.org>