mscoree: Add ICorDebug interface support (try 3)

[Vincent Povirk]

It's OK to call CLRMetaHost methods directly with a NULL ICLRMetaHost
instance. It's a singleton, and none of the methods use the interface.

You might want to check whether you get a new ICorDebug interface
every time you request one. I suspect you do.

On Wed, Sep 28, 2011 at 1:21 AM, Alistair Leslie-Hughes
<leslie_alistair at hotmail.com> wrote:
> Hi,
> Changed to use ICLRRuntimeInfo::GetInterface, suggest by Vincent.
> Moved the #undef to the header.
>
>
> Changelog:
>      mscoree: Add ICorDebug interface support
>
>
> Best Regards
>   Alistair Leslie-Hughes
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