expat: Update to version 2.2.9

Fixes CVE-2019-15903

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
(cherry picked from commit b4af2c689f)

tools/expat/Makefile

@@ -9,10 +9,10 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=expat
 PKG_CPE_ID:=cpe:/a:libexpat:expat
-PKG_VERSION:=2.2.7
+PKG_VERSION:=2.2.9
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
-PKG_HASH:=cbc9102f4a31a8dafd42d642e9a3aa31e79a0aedaa1f6efd2795ebc83174ec18
+PKG_HASH:=f1063084dc4302a427dabcca499c8312b3a32a29b7d2506653ecc8f950a9a237
 PKG_SOURCE_URL:=@SF/expat
 
 HOST_BUILD_PARALLEL:=1