libarchive: bump version

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libarchive/libarchive.mk

@@ -3,7 +3,7 @@
 # libarchive (reusable C library for archive formats)
 #
 #############################################################
-LIBARCHIVE_VERSION = 2.8.4
+LIBARCHIVE_VERSION = 2.8.5
 LIBARCHIVE_SITE = http://libarchive.googlecode.com/files/
 LIBARCHIVE_SOURCE = libarchive-$(LIBARCHIVE_VERSION).tar.gz
 LIBARCHIVE_INSTALL_STAGING = YES