samba: fix install for older samba versions
samba: fix install for older samba versions

* Samba 3.0 doesn't build libnss_*.so
* base_sbindir may contain mount.cifs

Signed-off-by: Andreas Oberritter <5c504a8ae171602809046bde94878da7dbc4e5ab@opendreambox.org>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

WindRiver-OpenSourceLabs/meta-oe-subset,WindRiver-OpenSourceLabs/meta-oe-subset