kernel32: add GetVolumeInformationByHandleW stub (try 2)

[Alex Henrie]

Two things, both nitpicks:

1. I wrap lines to 120 characters. Most other developers wrap to 80 or
100. A line with 181 characters seems excessive.

2. Your prototype in winbase.h uses DWORD * and WCHAR * whereas the
surrounding prototypes use LPDWORD and LPWSTR.

-Alex