libsigc++: bump to 2.4.1

Signed-off-by: Steven Barth <steven@midlink.org>

libs/libsigc++/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2014 OpenWrt.org
+# Copyright (C) 2006-2015 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libsigc++
-PKG_VERSION:=2.4.0
+PKG_VERSION:=2.4.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNOME/libsigc++/2.4
-PKG_MD5SUM:=c6cd2259f5ef973e4c8178d0abbdbfa7
+PKG_MD5SUM:=55945ba6e1652f89999e910f6b52047c
 PKG_MAINTAINER:=Steven Barth <cyrus@openwrt.org>
 PKG_LICENSE:=LGPL-2.1