ada: Correct System.Win32.LocalFileTimeToFileTime wrapper typo

The parameters should be swapped to fit Fileapi.h documentation.
BOOL LocalFileTimeToFileTime(
	[in]  const FILETIME *lpLocalFileTime,
	[out] LPFILETIME     lpFileTime
);

gcc/ada/
	* libgnat/s-win32.ads (LocalFileTimeToFileTime): Swap parameters.