advapi32: Add more SID tests

[Alexandre Julliard]

Robert Reif <reif at earthlink.net> writes:

> ConvertStringSidToSid is supported on NT and later but the particular
> type of two character sid that I am testing is only avaliable on XP
> and later.

Yes, but the right way is to call it and check if it works. On Wine
the Windows version can report anything but the function will still
work, and should be tested.

-- 
Alexandre Julliard
julliard at winehq.org