moonlander: unbreak with ld.lld on powerpc

powerpc does not inline sqrt(3) unlike other lld archs, so it actually uses
libm and as such the `-lm' linker flag is needed.

While here, refresh WANTLIB and add FIX_EXTRACT_PERMISSIONS.

tweak and ok gkoehler@

games/moonlander/Makefile

@@ -1,18 +1,20 @@
-# $OpenBSD: Makefile,v 1.14 2020/03/20 16:44:23 naddy Exp $
+# $OpenBSD: Makefile,v 1.15 2021/08/28 09:07:11 cwen Exp $
 
 COMMENT=	clone of atari game
 DISTNAME=	moon-lander-1.0
 PKGNAME=	moonlander-1.0
-REVISION=	2
+REVISION=	3
 CATEGORIES=	games x11
 MASTER_SITES=	http://downloads.daveblood.com/lunar_lander/
 
+FIX_EXTRACT_PERMISSIONS=	yes
+
 HOMEPAGE=	http://magigames.org/moonlander.html
 
 # BSD
 PERMIT_PACKAGE=	Yes
 
-WANTLIB= SDL X11 Xext c m pthread usbhid xcb SDL_image SDL_mixer
+WANTLIB += SDL SDL_image SDL_mixer c m pthread
 
 LIB_DEPENDS=	devel/sdl-image \
 		devel/sdl-mixer

games/moonlander/patches/patch-Makefile

@@ -1,6 +1,11 @@
-$OpenBSD: patch-Makefile,v 1.1.1.1 2003/04/15 16:01:42 espie Exp $
---- Makefile.orig	Tue Aug 14 18:28:49 2001
-+++ Makefile	Thu Apr 10 14:54:33 2003
+$OpenBSD: patch-Makefile,v 1.2 2021/08/28 09:07:11 cwen Exp $
+
+The `-lm' linker flag is needed for architectures not inlining sqrt(3), like
+powerpc.
+
+Index: Makefile
+--- Makefile.orig
++++ Makefile
 @@ -1,26 +1,20 @@
  # Makefile for test program for game_libs - lunar lander
 -CFLAGS=-Wall `sdl-config --libs --cflags` 
@@ -9,7 +14,7 @@ $OpenBSD: patch-Makefile,v 1.1.1.1 2003/04/15 16:01:42 espie Exp $
 +#CC=gcc
  
 -LIBS=SDL_image
-+LIBS=`sdl-config --libs` -lSDL_image -lSDL_mixer
++LIBS=`sdl-config --libs` -lSDL_image -lSDL_mixer -lm
  
  C_FILES=moon_lander.c game_lib.c DT_drawtext.c
  OBJ_FILES=moon_lander.o game_lib.o DT_drawtext.o