cmd: Allow a batch file to delete itself.

programs/cmd/batch.c

@@ -51,7 +51,7 @@ void WCMD_batch (WCHAR *file, WCHAR *command, int called, WCHAR *startLabel, HAN
   BATCH_CONTEXT *prev_context;
 
   if (startLabel == NULL) {
-    h = CreateFileW (file, GENERIC_READ, FILE_SHARE_READ,
+    h = CreateFileW (file, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
                      NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
     if (h == INVALID_HANDLE_VALUE) {
       SetLastError (ERROR_FILE_NOT_FOUND);

programs/cmd/tests/test_builtins.cmd.exp

@@ -725,7 +725,7 @@ foo ''
 non-builtin dir
 ------------ Testing cmd invocation ------------
 ... a batch file can delete itself ...
-@todo_wine@file correctly deleted
+file correctly deleted
 ... a batch file can alter itself ...
 @todo_wine@bar
 ------------ Testing setlocal/endlocal ------------