[source] tools/expat: Update to 2.2.0

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/bf567363cd98dd36ffef7312afc066b14bb9237f

commit bf567363cd98dd36ffef7312afc066b14bb9237f
Author: diizzyy <diizzyy at users.noreply.github.com>
AuthorDate: Sun Oct 2 23:03:15 2016 +0200

    tools/expat: Update to 2.2.0
    
    Updates expat to 2.2.0
    
    Fixes several CVEs:
    CVE-2016-0718
    CVE-2016-4472
    CVE-2016-5300
    CVE-2012-6702
    
    Signed-off-by: Daniel Engberg <daniel.engberg.lists at pyret.net>
---
 tools/expat/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/expat/Makefile b/tools/expat/Makefile
index dfd5f28..93e0f74 100644
--- a/tools/expat/Makefile
+++ b/tools/expat/Makefile
@@ -8,10 +8,10 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=expat
-PKG_VERSION:=2.1.0
+PKG_VERSION:=2.2.0
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_MD5SUM:=dd7dab7a5fea97d2a6a43f511449b7cd
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_MD5SUM:=2f47841c829facb346eb6e3fab5212e2
 PKG_SOURCE_URL:=@SF/expat
 
 HOST_BUILD_PARALLEL:=1