package/xz: enable year2038 option

All our up-to-date libc variants now support Y2038, so we can turn this
on unconditionally.

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/xz/xz.mk

@@ -39,7 +39,7 @@ XZ_CONF_OPTS = \
 	--enable-unaligned-access=auto \
 	--disable-unsafe-type-punning \
 	--disable-werror \
-	--disable-year2038
+	--enable-year2038
 
 ifeq ($(BR2_SYSTEM_ENABLE_NLS),y)
 XZ_CONF_OPTS += --enable-nls