[source] tools/expat: Update to 2.2.3

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/1a5b7cc151ac6f46481d476a0ea245466bd3c181

commit 1a5b7cc151ac6f46481d476a0ea245466bd3c181
Author: Daniel Engberg <daniel.engberg.lists at pyret.net>
AuthorDate: Mon Aug 7 05:00:46 2017 +0200

    tools/expat: Update to 2.2.3
    
    Update (lib)expat to 2.2.3
    Remove poor entropy hack, 2.2.3 uses /dev/urandom in worst case
    
    Signed-off-by: Daniel Engberg <daniel.engberg.lists at pyret.net>
---
 tools/expat/Makefile | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tools/expat/Makefile b/tools/expat/Makefile
index 246089d..1f856c9 100644
--- a/tools/expat/Makefile
+++ b/tools/expat/Makefile
@@ -8,19 +8,16 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=expat
-PKG_VERSION:=2.2.2
+PKG_VERSION:=2.2.3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
-PKG_HASH:=4376911fcf81a23ebd821bbabc26fd933f3ac74833f74924342c29aad2c86046
+PKG_HASH:=b31890fb02f85c002a67491923f89bda5028a880fd6c374f707193ad81aace5f
 PKG_SOURCE_URL:=@SF/expat
 
 HOST_BUILD_PARALLEL:=1
 
 include $(INCLUDE_DIR)/host-build.mk
 
-HOST_CONFIGURE_VARS += \
-	CPPFLAGS="$(HOST_CFLAGS) -DXML_POOR_ENTROPY"
-
 define Host/Install
 	$(MAKE) -C $(HOST_BUILD_DIR) install
 endef