games/eboard: fix build

games/eboard/files/patch-sound.cc

+--- sound.cc.orig	2018-07-31 18:02:19 UTC
++++ sound.cc
+@@ -38,7 +38,7 @@
+ #include <math.h>
+ #include <limits.h>
+ #include <gst/gst.h>
+-#include <endian.h>
++#include <sys/endian.h>
+ 
+ #include "sound.h"
+ #include "global.h"