games/eduke32: Build against SDL 1, not 2.

games/eduke32/eduke32.SlackBuild

@@ -64,11 +64,11 @@ fi
 sed -i '/"Error: glGetTexLevelParameteriv/d' build/src/texcache.c
 
 # Mildly confusing: the Makefile uses ARCH for arch-specific cflags
-make ARCH="$SLKCFLAGS" $VPXFLAG
+make ARCH="$SLKCFLAGS" $VPXFLAG SDL_TARGET=1
 
 # Build the utilities, if requested.
 if [ "${BUILD_UTILS:-yes}" = "yes" ]; then
-  make utils ARCH="$SLKCFLAGS"
+  make utils ARCH="$SLKCFLAGS" SDL_TARGET=1
 
   for i in kextract kgroup transpal wad2art wad2map; do
     install -s -D -m0755 $i $PKG/usr/games/$i