xz: downgrade because of backdoor

package/xz/Makefile

@@ -4,18 +4,17 @@
 include $(ADK_TOPDIR)/rules.mk
 
 PKG_NAME:=		xz
-PKG_VERSION:=		5.6.0
+PKG_VERSION:=		5.4.6
 PKG_RELEASE:=		1
-PKG_HASH:=		0f5c81f14171b74fcc9777d302304d964e63ffc2d7b634ef023a7249d9b5d875
+PKG_HASH:=		913851b274e8e1d31781ec949f1c23e8dbcf0ecf6e73a2436dc21769dd3e6f49
 PKG_DESCR:=		compression utility
 PKG_SECTION:=		app/archive
 PKG_DEPENDS:=		libxz
-PKG_URL:=		http://tukaani.org/xz/
+PKG_SITES:=		https://distfiles.openadk.org/
-PKG_SITES:=		https://github.com/tukaani-project/xz/releases/download/v$(PKG_VERSION)/
 PKG_LIBNAME:=		libxz
 PKG_OPTS:=		dev
 
-DISTFILES:=		$(PKG_NAME)-$(PKG_VERSION).tar.gz
+DISTFILES:=		$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 
 PKG_SUBPKGS:=		XZ LIBXZ
 PKGSD_LIBXZ:=		xz compression library