Bump samba34 port to the 3.4.8 version.
Major enhancements in Samba 3.4.8 include:
o Fix Winbind reconnection to it's own domain (bug #7295).
o Fix an uninitialized variable read in smbd (bug #7254).
o Fix smbd crash with CUPS printers and no [printers] share defined
o Fix NULL pointer dereference in smbd (bug #7229).