For libarchive-native, we don't really need libxml2 support. Adding this
means we need libxml2-native which means we need python-native and
makes the dependency chains pretty heavy. The target case is unaffected.
(From OE-Core rev: 9b3ad50b2239484fddfc918c8c1819e1ffdb634c)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>