zlib: Update to 1.2.9

Update zlib to 1.2.9 and switch to XZ tarballs for download.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

package/libs/zlib/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=zlib
-PKG_VERSION:=1.2.8
+PKG_VERSION:=1.2.9
 PKG_RELEASE:=1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://www.zlib.net @SF/libpng
-PKG_HASH:=36658cb768a54c1d4dec43c3116c27ed893e88b02ecfcb44f2166f9c0b7f2a0d
+PKG_HASH:=03d9c7f67976cf1389589782de46f45011053ea7f4222c2fb8c2cf9fd813bb68
 
 PKG_LICENSE:=Zlib
 PKG_LICENSE_FILES:=README