Update third party libs

Noteworthy is the update of Berkeley DB. This database can be used
for meta data on pools. If used, pools are not downgradable without
manual conversion. Once upgraded, to downgrade a pool use the
'dcache pool convert' utility to convert to the file based meta data
backend before downgrading. Once downgraded, the meta data can be
converted back to the Berkeley DB using the same utility.

On upgrade no actions are required.

Target: trunk
Require-notes: yes
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: https://rb.dcache.org/r/7048/