gnuski: add package

packages/gnuski/Makefile.patch

@@ -0,0 +1,19 @@
+--- ../Makefile.orig	2020-05-09 17:15:03.947271379 +0200
++++ ./Makefile	2020-05-09 17:16:08.437076432 +0200
+@@ -1,10 +1,12 @@
+-CC=gcc
+-FLAGS=-O2 -o gnuski
+-LIBS=-lncurses
++CC ?= gcc
++LIBS = -lncurses
+ FILES=main.c objects.c
+ 
+ all:
+-	$(CC) $(FLAGS) $(FILES) $(LIBS)
++	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(FILES) $(LIBS) -o gnuski
+ 
+ clean:
+ 	rm *~ gnuski
++
++install:
++	install -Dm700 gnuski $(PREFIX)/bin/

packages/gnuski/build.sh

@@ -0,0 +1,9 @@
+TERMUX_PKG_HOMEPAGE=https://sourceforge.net/projects/gnuski
+TERMUX_PKG_DESCRIPTION="Open source clone of Skifree, the old Windows game"
+TERMUX_PKG_LICENSE="GPL-2.0"
+TERMUX_PKG_MAINTAINER="Henrik Grimler @Grimler91"
+TERMUX_PKG_VERSION=0.3
+TERMUX_PKG_SRCURL=https://sourceforge.net/projects/gnuski/files/gnuski/gnuski-${TERMUX_PKG_VERSION}/gnuski-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=1b629bd29dd6ad362b56055ccdb4c7ad462ff39d7a0deb915753c2096f5f959d
+TERMUX_PKG_DEPENDS="ncurses"
+TERMUX_PKG_BUILD_IN_SRC=true

packages/gnuski/objects.h.patch

@@ -0,0 +1,10 @@
+This patch just silences a warning about implicit declaration of setupColors
+--- ../objects.h.orig	2020-05-09 17:21:04.179875753 +0200
++++ ./objects.h	2020-05-09 17:20:45.526561303 +0200
+@@ -49,4 +49,6 @@
+ /* Checks for collision between a player object and a target */
+ int collision (struct Object player, struct Object target);
+ 
++void setupColors ();
++
+ #endif