$NetBSD: patch-Makefile,v 1.2 2016/09/04 12:40:24 wiz Exp $

Enable install target for NetBSD.
https://github.com/facebook/zstd/pull/338

--- Makefile.orig	2016-09-04 12:01:55.355932317 +0000
+++ Makefile
@@ -51,7 +51,7 @@ clean:
 #----------------------------------------------------------------------------------
 #make install is validated only for Linux, OSX, kFreeBSD, Hurd and some BSD targets
 #----------------------------------------------------------------------------------
-ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU FreeBSD DragonFly))
+ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU FreeBSD DragonFly NetBSD))
 HOST_OS = POSIX
 install:
 	$(MAKE) -C $(ZSTDDIR) $@