samba: split packages similar to samba3

Since entire samba4 package is around 25MB, trying to save some space by
splitting the package into several ones logically grouped as they were
at samba3 in fido.

Signed-off-by: Jens Rehsack <sno@netbsd.org>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>