Ports: Added a SDL2_image port

Ports/SDL2_image/package.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=SDL2_image
+useconfigure=true
+version=2.0.5
+depends="SDL2 libpng libjpeg"
+files="https://www.libsdl.org/projects/SDL_image/release/SDL2_image-${version}.tar.gz SDL_image-${version}.tar.gz"
+
+configure() {
+    run ./configure \
+        --host="${SERENITY_ARCH}-pc-serenity" \
+        --with-sdl-prefix="${SERENITY_BUILD_DIR}/Root/usr" \
+        --prefix="/usr"                                    \
+        --enable-webp=false --enable-webp-shared=false     \
+        LDFLAGS="-lgui -lgfx -lipc -lcore -lm"
+}
+
+build() {
+    run make -k
+}
+
+install() {
+    run make -k DESTDIR="${SERENITY_BUILD_DIR}/Root" install
+}

Ports/SDL2_image/patches/configure.patch

@@ -0,0 +1,11 @@
+--- SDL2_image-2.0.5/config.sub	2019-06-30 06:52:03.000000000 +0200
++++ /home/baitinq/serenity/Ports/SDL2_image-2.0.5/config.sub	2021-04-01 01:55:57.769997556 +0200
+@@ -1363,7 +1363,7 @@
+ 	# The portable systems comes first.
+ 	# Each alternative MUST end in a * to match a version number.
+ 	# -sysv* is not here because it comes later, after sysvr4.
+-	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
++	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -serenity* | -irix* \
+ 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
+ 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
+ 	      | -sym* | -kopensolaris* | -plan9* \