libnl: add patch to fix bmon build breakage

Revert a 3.2.26 patch that breaks the bmon build (among possibly
others). Fixes:
http://autobuild.buildroot.net/results/296/296bcaf4fd1fadcab71881d6d00a8763bfa91a41/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libnl/0001-Revert-route-remove-unnecessary-include-of-private-lin.patch

@@ -0,0 +1,44 @@
+From 61310ce3f2b6c5c21be8c788848f083e4c58d138 Mon Sep 17 00:00:00 2001
+From: Gustavo Zacarias <gustavo@zacarias.com.ar>
+Date: Fri, 17 Apr 2015 07:20:48 -0300
+Subject: [PATCH] Revert "route: remove unnecessary include of private
+ linux/if.h"
+
+It breaks rtnl_link_get_flags() checks against IFF_* defines that aren't
+defined.
+
+This reverts commit 50a76998ac36ace3716d3c979b352fac73cfc80a.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+---
+ include/netlink/route/link.h | 1 +
+ src/nl-link-set.c            | 1 -
+ 2 files changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/netlink/route/link.h b/include/netlink/route/link.h
+index 8f74f42..a7aa88b 100644
+--- a/include/netlink/route/link.h
++++ b/include/netlink/route/link.h
+@@ -15,6 +15,7 @@
+ #include <netlink/netlink.h>
+ #include <netlink/cache.h>
+ #include <netlink/addr.h>
++#include <linux/if.h>
+ #include <sys/types.h>
+ 
+ #ifdef __cplusplus
+diff --git a/src/nl-link-set.c b/src/nl-link-set.c
+index 6a6bac8..bbb60f9 100644
+--- a/src/nl-link-set.c
++++ b/src/nl-link-set.c
+@@ -9,7 +9,6 @@
+  * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
+  */
+ 
+-#include <linux/if.h>
+ #include <netlink/cli/utils.h>
+ #include <netlink/cli/link.h>
+ 
+-- 
+2.0.5
+