Windows disallows file names that contain a star. Arrange the test setup
to insert the file name "f*" in the repository without the corresponding
file in the worktree.
Signed-off-by: Johannes Sixt <j6t@kdbg.org> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>