shell32: Implement IPersistFile_fnSaveCompleted

[Nikolay Sivov]

Vladimir Pankratov wrote:
> Hello all.
>
> Implemented IPersistFile_fnSaveCompleted.
>
> changed files:
> dlls/shell32/shelllink.c
>
> Thanks.
---
+ TRACE("(%p)->(%s)\n",This,debugstr_w(pszFileName));
+ return S_OK; /* MSDN says: return value S_OK, returned in all cases */
---

You shouldn't care much of what MSDN says, please provide some tests.