ruby: update to 2.2.1

For ruby changes since 2.2.0:
 http://svn.ruby-lang.org/repos/ruby/tags/v2_2_1/ChangeLog

No relevant changes for OpenWRT.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>

lang/ruby/Makefile

 #
-# 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.
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ruby
-PKG_VERSION:=2.2.0
+PKG_VERSION:=2.2.1
 PKG_RELEASE:=1
 
 PKG_LIBVER:=2.2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://cache.ruby-lang.org/pub/ruby/$(PKG_LIBVER)/
-PKG_MD5SUM:=d03cd4690fec1fff81d096d1c1255fde
+PKG_MD5SUM:=06973777736d8e6bdad8dcaa469a9da3
 PKG_MAINTAINER:=Luiz Angelo Daros de Luca <luizluca@gmail.com>
 PKG_LICENSE:=BSD-2-Clause
 PKG_LICENSE_FILES:=COPYING