samba: add new package libwbclient to avoid libsmbclient dragging in samba

To find which dependency dragged in samba in folder image readelf was
performed:

> readelf -d usr/lib/libsmbclient.so

Dynamic section at offset 0x4bfec0 contains 36 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
 0x00000001 (NEEDED)                     Shared library: [libtalloc.so.2]
 0x00000001 (NEEDED)                     Shared library: [libtdb.so.1]
 0x00000001 (NEEDED)                     Shared library: [libwbclient.so.0]
 0x00000001 (NEEDED)                     Shared library: [libresolv.so.2]
 0x00000001 (NEEDED)                     Shared library: [libnsl.so.1]
 0x00000001 (NEEDED)                     Shared library: [libdl.so.2]
 0x00000001 (NEEDED)                     Shared library: [librt.so.1]
 0x00000001 (NEEDED)                     Shared library: [libz.so.1]
 0x00000001 (NEEDED)                     Shared library: [libpthread.so.0]
 0x00000001 (NEEDED)                     Shared library: [libgcc_s.so.1]
 0x0000000e (SONAME)                     Library soname: [libsmbclient.so.0]

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>