$NetBSD$

Avoid duplicate symbols in libepson and libepson2.

--- backend/epson2.c.orig	2010-12-27 14:36:45.000000000 +0000
+++ backend/epson2.c
@@ -72,7 +72,7 @@
 #include "epson2-ops.h"
 
 #include "epson2_scsi.h"
-#include "epson_usb.h"
+#include "epson_usb.c"
 #include "epson2_net.h"
 
 /*
