Warnings during shell32 build

[Ge van Geldorp]

> From: Ge van Geldorp
>
> Log message:
>    -Don't define COBJMACROS in objbase.h.
>    Update the Wine sources accordingly.

I know this will cause warnings during shell32 compilation ("warning:
"COBJMACROS" redefined"), will fix this with the next Wine sync.

Gé van Geldorp.