bump samba for darwin from 3.6.0 to 3.6.12
Merge pull request #2219 from ulion/bump_darwin_samba_3_6_12

bump samba for darwin from 3.6.0 to 3.6.12

Fixes access to samba server running on osx 10.7 and later (was worked around by custom samba package via smbup which is superseeded by this).