cmd: Use RtlGetVersion to fix displayed Windows version on Win8.1 or 10 prefix.

programs/cmd/wcmd.h

@@ -22,6 +22,7 @@
 #define IDI_ICON1	1
 #include <windows.h>
 #include <windef.h>
+#include <winternl.h>
 #ifndef RC_INVOKED
 #include <string.h>
 #include <stdlib.h>

programs/cmd/wcmdmain.c

@@ -2437,7 +2437,7 @@ int __cdecl wmain (int argc, WCHAR *argvW[])
   static const WCHAR cmdW[] = {'\\','c','m','d','.','e','x','e',0};
   WCHAR comspec[MAX_PATH];
   CMD_LIST *toExecute = NULL;         /* Commands left to be executed */
-  OSVERSIONINFOW osv;
+  RTL_OSVERSIONINFOEXW osv;
   char osver[50];
   STARTUPINFOW startupInfo;
 
@@ -2452,7 +2452,7 @@ int __cdecl wmain (int argc, WCHAR *argvW[])
 
   /* Get the windows version being emulated */
   osv.dwOSVersionInfoSize = sizeof(osv);
-  GetVersionExW(&osv);
+  RtlGetVersion(&osv);
 
   /* Pre initialize some messages */
   lstrcpyW(anykey, WCMD_LoadMessage(WCMD_ANYKEY));