* gnu/packages/games.scm (pinball): New variable. * gnu/packages/patches/pinball-const-fix.patch, gnu/packages/patches/pinball-cstddef.patch, gnu/packages/patches/pinball-missing-separators.patch, gnu/packages/patches/pinball-src-deps.patch, gnu/packages/patches/pinball-system-ltdl.patch: New patches. * gnu-system.am (dist_patch_DATA): Add them.