ntdll: Implement few Dbg* functions.

[Eric Pouech]

Eric Pouech wrote:
> IMO, the Ui ones seem to be rather old (NT4 or something) whereas the 
> ones I'm talking about are more recent (XP), but seem better defined 
> (API wise). For example, only XP version seems to provide the wait for 
> debug object and continue APIs. That's why it seems to me more 
> interesting to me that we move to the XP flavor.
actually, you could implement it on top of Ui flavor as well
we'll have to dig deeper to tell the differences
A+

-- 
Eric Pouech