Add schismtracker recipe

recipes/schismtracker/01_redox.patch

+diff -rupNw source-original/Makefile.am source/Makefile.am
+--- source-original/Makefile.am	2018-08-10 07:04:54.000000000 +0200
++++ source/Makefile.am	2018-12-30 23:18:07.957244170 +0100
+@@ -223,7 +223,7 @@ files_macosx = \
+ endif
+ 
+ if USE_NETWORK
+-cflags_network=-DUSE_NETWORK
++#cflags_network=-DUSE_NETWORK
+ endif
+ 
+ 
+diff -rupNw source-original/schism/main.c source/schism/main.c
+--- source-original/schism/main.c	2018-08-10 07:04:54.000000000 +0200
++++ source/schism/main.c	2018-12-30 23:19:24.954046191 +0100
+@@ -1033,7 +1033,7 @@ int main(int argc, char **argv)
+ 
+ 	video_fullscreen(0);
+ 
+-	tzset(); // localtime_r wants this
++	//tzset(); // localtime_r wants this
+ 	srand(time(NULL));
+ 	parse_options(argc, argv); /* shouldn't this be like, first? */
+ 

recipes/schismtracker/recipe.sh

+VERSION=20181223
+TAR=https://github.com/schismtracker/schismtracker/archive/$VERSION.tar.gz
+TAR_SHA256=fc32930c611fdb78face87dbe8a3c62e70088fd8d4ad803140e0b9a0b2e72ad7
+BUILD_DEPENDS=(sdl liborbital libiconv)
+
+function recipe_version {
+    echo "$VERSION"
+    skip=1
+}
+
+function recipe_update {
+    echo "skipping update"
+    skip=1
+}
+
+function recipe_build {
+    sysroot="${PWD}/../sysroot"
+    export CFLAGS="-I$sysroot/include -I$sysroot/include/SDL"
+    export LDFLAGS="-L$sysroot/lib"
+    export SDL_CONFIG="$sysroot/bin/sdl-config"
+    autoreconf -i
+    ./configure --host=${HOST} --prefix=''
+    make -j"$(nproc)"
+    skip=1
+}
+
+function recipe_test {
+    echo "skipping test"
+    skip=1
+}
+
+function recipe_clean {
+    make clean
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    make DESTDIR="$dest" install
+    skip=1
+}