$NetBSD$

Don't use mkdir and cp directly, use BSD_INSTALL_* abstraction instead

--- Makefile.orig	2015-01-15 18:58:20.000000000 +0000
+++ Makefile
@@ -18,8 +18,8 @@ test: lib
 	LUA_CPATH=./src/?.so lua tests/test.lua
 
 install:
-	mkdir -p $(LUA_LIBDIR)
-	cp src/lfs.so $(LUA_LIBDIR)
+	$(BSD_INSTALL_LIB_DIR) $(DESTDIR)$(LUA_LIBDIR)
+	$(BSD_INSTALL_LIB) src/lfs.so $(DESTDIR)$(LUA_LIBDIR)
 
 clean:
 	rm -f src/lfs.so $(OBJS)
