[source] tools/expat: Update host version to 2.2.2

[LEDE Commits]

thess pushed a commit to source.git, branch master:
https://git.lede-project.org/b4ce088f06c5ee5c055f45361d03ac3ffcaaf2cf

commit b4ce088f06c5ee5c055f45361d03ac3ffcaaf2cf
Author: Ted Hess <thess at kitschensync.net>
AuthorDate: Mon Jul 17 16:42:29 2017 -0400

    tools/expat: Update host version to 2.2.2
    
    Ref: CVE-2017-9233, CVE-2016-9063
    
    Signed-off-by: Ted Hess <thess at kitschensync.net>
---
 tools/expat/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/expat/Makefile b/tools/expat/Makefile
index bdc93fe..697d3f6 100644
--- a/tools/expat/Makefile
+++ b/tools/expat/Makefile
@@ -8,10 +8,10 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=expat
-PKG_VERSION:=2.2.0
+PKG_VERSION:=2.2.2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
-PKG_HASH:=d9e50ff2d19b3538bd2127902a89987474e1a4db8e43a66a4d1a712ab9a504ff
+PKG_HASH:=4376911fcf81a23ebd821bbabc26fd933f3ac74833f74924342c29aad2c86046
 PKG_SOURCE_URL:=@SF/expat
 
 HOST_BUILD_PARALLEL:=1