specify some deps on private libs actually used directly

specify some deps on private libs actually used directly

Lots of samba libraries has incomplete dependencies listed
in wscript files.  This usually is not a problem since the
link line includes dependencies of their dependencies of
their dependencies, and somewhere down that line all immediate
dependencies which are missing are actually present.  But
sometimes this becomes a problem when a library does not
declare direct dependency on at least one private library
which it actually uses: in case no private library is
listed as direct dependency, private library directory is
not put into RUNPATH of the resulting binary, so the binary
can not find its own dependencies.

Fix a few such places, including some libraries which are
a part of public abi (libsmbldap, libndr).

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Pavel Filipenský <pfilipensky@samba.org>