tape tools: Rename test-nasdaq-itch41.c to tools/tape

Rename test-nasdaq-itch41.c to tools/tape/tape.c in preparation for
making it more generic.

Signed-off-by: Pekka Enberg <penberg@kernel.org>
tape tools: Add new 'check' command

Move the current functionality under a 'tape check' command.

Signed-off-by: Pekka Enberg <penberg@kernel.org>
tape tools: Fix formatting in print_stats

Convert spaces to tabs.

Signed-off-by: Pekka Enberg <penberg@kernel.org>