Unbreak package after upgrade.

sysutils/smartmontools/distinfo

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.29 2017/12/15 03:02:10 nonaka Exp $
+$NetBSD: distinfo,v 1.30 2017/12/15 11:38:26 hauke Exp $
 
 SHA1 (smartmontools-6.6.tar.gz) = 8946f6350d6df9341d571381d66ffbb7d83b8af2
 RMD160 (smartmontools-6.6.tar.gz) = 8504a7a04e99d26acb3662ae5e0e8e6d38a52b5d
@@ -6,3 +6,4 @@ SHA512 (smartmontools-6.6.tar.gz) = 64bb533dac29f62ddd662a16a12c97df1af9cbac9ac5
 Size (smartmontools-6.6.tar.gz) = 903847 bytes
 SHA1 (patch-aa) = bd08aff267f0e9e9307ebc57858e61e35144bf16
 SHA1 (patch-ag) = 01b0b35d89d6d6a11b13b3c05a141c46a0c1590b
+SHA1 (patch-os_netbsd.cpp) = 8402fe8bf5e5af2c262e4b159ff3799814d6963a

sysutils/smartmontools/patches/patch-os_netbsd.cpp

@@ -0,0 +1,14 @@
+$NetBSD: patch-os_netbsd.cpp,v 1.1 2017/12/15 11:38:26 hauke Exp $
+
+Missing #include
+
+--- os_netbsd.cpp.orig	2017-08-08 19:38:15.000000000 +0000
++++ os_netbsd.cpp
+@@ -26,6 +26,7 @@
+ 
+ #include <sys/drvctlio.h>
+ #include <sys/utsname.h>
++#include <sys/stat.h>
+ #include <errno.h>
+ #include <unistd.h>
+