CVE-2016-1683
CVE-2016-1684
Whether any of these affect the OpenOffice usage of libxslt is not known.
OpenOffice uses libxslt for help, document signing and encryption, and
for RDF.

libxslt-CVE-2015-7995.patch is no longer needed because this issue
has been fixed upstream.

Re-roll the other patches, some of which got simplified because of
upstream fixes.