gnu: wesnoth: Update to 1.14.0.

gnu: wesnoth: Update to 1.14.0.

* gnu/packages/patches/wesnoth-fix-std-bad-cast.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/games.scm (wesnoth): Update to 1.14.0.
[source]: Add wesnoth-fix-std-bad-cast.patch to patches.
[arguments]: Remove "-DENABLE_STRICT_COMPILATION=OFF" configure flag.
[inputs]: Remove sdl-image, sdl-mixer, sdl-net and sdl-ttf. Add openssl and
sdl-union of sdl2, sdl2-image, sdl2-mixer and sdl2-ttf.
[home-page]: Use HTTPS URI.
(wesnoth-server)[inputs]: Remove sdl-net. Add icu4c, openssl and sdl2.
[arguments]: Remove delete-data phase. Since wesnoth 1.14.0, configure flag
"-DENABLE_GAME=OFF" disables installation of game assets.