tools/expat: Update host version to 2.2.2

Ref: CVE-2017-9233, CVE-2016-9063

Signed-off-by: Ted Hess <[email protected]>

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