librpc/rpc: Add windows propertyset info and associated accessor and helper api.

librpc/rpc: Add windows propertyset info and associated accessor and helper api.

wsp_util.c contains property definitions for well known windows
properties that can be used with WSP. These properties are generated from
some csv files (located in the librpc/wsp). The csv files themselves
were generated from a couple of sources e.g. the [MS-WSP]:
Windows Search Protocol document and wireshark mswsp dissector source code.

for more details please see librpc/wsp/README

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>