cmd/tests: Add test for attrib without parameter.

Signed-off-by: Bernhard Übelacker <bernhardu@mailbox.org>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

programs/cmd/tests/test_builtins.cmd

@@ -2360,6 +2360,7 @@ echo ------------ Testing attrib ------------
 rem FIXME Add tests for archive, hidden and system attributes + mixed attributes modifications
 mkdir foobar & cd foobar
 echo foo original contents> foo
+attrib
 attrib foo
 echo > bar
 echo --- read-only attribute

programs/cmd/tests/test_builtins.cmd.exp

@@ -1431,6 +1431,7 @@ bar\baz removed
 @pwd@
 ------------ Testing attrib ------------
 A@spaces@@drive@@path@foobar\foo@or_broken@A       I@spaces@@drive@@path@foobar\foo
+A@spaces@@drive@@path@foobar\foo@or_broken@A       I@spaces@@drive@@path@foobar\foo
 --- read-only attribute
 A    R@spaces@@drive@@path@foobar\foo@or_broken@A    R  I@spaces@@drive@@path@foobar\foo
 foo