The patch associated with the CVE-2017-8872 report was never merged into
libxml2, but a slightly different patch for the same problem was. Cherry-pick
that as a backport, which also fixes the failing test suite.
(From OE-Core rev: 512869aea6dde1bb2374601f7c4d793ac9edaa42)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>