Zillions of auto_ptr warnings in boost.

Change-Id: Ib9071c0241c2cb4c748f2634c1b39a2f8e889c20
Reviewed-on: https://gerrit.libreoffice.org/20737Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit ee26cbc5)