Ports: Add SDL2_gfx

Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/0490540e21b
Pull-request: https://github.com/SerenityOS/serenity/pull/6118

Ports/AvailablePorts.md

@@ -74,6 +74,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`rsync`](rsync/)              | rsync                                         | 3.1.3             | https://rsync.samba.org/                              |
 | [`scummvm`](scummvm/)          | ScummVM                                       | 2.2.0             | https://www.scummvm.org/                              |
 | [`SDL2`](SDL2/)                | Simple DirectMedia Layer (SDL2)               |                   | https://github.com/SerenityOS/SDL                     |
+| [`SDL2_gfx`](SDL2_gfx/)        | SDL2\_gfx (Graphics primitives add-on for SDL2) | 1.0.4           | https://sourceforge.net/projects/sdl2gfx/             |
 | [`SDL2_image`](SDL2_image/)    | SDL2\_image (Image loading add-on for SDL2)   | 2.0.5             | https://www.libsdl.org/projects/SDL_image/            |
 | [`SDL2_mixer`](SDL2_mixer/)    | SDL2\_mixer (audio mixer add-on for SDL2)     | 2.0.4             | https://www.libsdl.org/projects/SDL_mixer/            |
 | [`SDL2_ttf`](SDL2_ttf/)        | SDL2\_ttf (TrueType Font add-on for SDL2)     | 2.0.15            | https://www.libsdl.org/projects/SDL_ttf/              |

Ports/SDL2_gfx/package.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+
+port=SDL2_gfx
+version=1.0.4
+files="https://downloads.sourceforge.net/project/sdl2gfx/SDL2_gfx-${version}.tar.gz SDL2_gfx-${version}.tar.gz"
+depends="SDL2"
+useconfigure=true
+configopts="--with-sdl-prefix=${SERENITY_BUILD_DIR}/Root/usr"

Ports/SDL2_gfx/patches/fix-autoconf.patch

@@ -0,0 +1,11 @@
+--- SDL2_gfx-1.0.4/config.sub	2021-04-04 18:40:50.418255684 +0200
++++ SDL2_gfx-1.0.4/config.sub	2021-04-04 18:42:32.801888295 +0200
+@@ -1355,7 +1355,7 @@
+ 	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
+ 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
+ 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
+-	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es*)
++	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* | -serenity*)
+ 	# Remember, each alternative MUST END IN *, to match a version number.
+ 		;;
+ 	-qnx*)