Do not use Boost in SDK examples

Change-Id: I8b2af447fe3ee29261e538a53b4624ff8b6c4d1e
(cherry picked from commit ca4065680a402e3d0ff43e41744b24a9c980b2ef)
Reviewed-on: https://gerrit.libreoffice.org/7118
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>