poco: update to 1.7.3

Update package to latest stable version (1.7.3)

Signed-off-by: Jean-Michel Julien <jean-michel.julien@trilliantinc.com>

libs/poco/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=poco
-PKG_VERSION:=1.7.0
+PKG_VERSION:=1.7.3
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=http://pocoproject.org/releases/poco-1.7.0
-PKG_MD5SUM:=dbbc98ab95910cc31bf4f1ffff9ac572
+PKG_SOURCE_URL:=http://pocoproject.org/releases/poco-1.7.3
+PKG_MD5SUM:=a27c40529b6c32352ec890f6fe18bc0d
 
 PKG_LICENSE:=BSL-1.0
 PKG_LICENSE_FILES:=LICENSE