od: skip past end of seekable inputs without error

[sylvestre]

fixes: tests/od/od-j

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/date/resolution (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/tail-n0f (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/od/od-j is no longer failing!
Skip an intermittent issue tests/pr/bounded-memory (was skipped on 'main', now failing)

[cakebaker]

One of the new tests fails on WASI with:

run: /home/runner/work/coreutils/coreutils/target/wasm32-wasip1/debug/coreutils.wasm od -j1 /dev/null

thread 'test_od::test_skip_bytes_past_end_of_seekable_device' (28790) panicked at tests/by-util/test_od.rs:945:10:
Command was expected to succeed. code: 1
stdout = 
 stderr = od: /dev/null: No such file or directory
od: tried to skip past end of input

[oech3]

is this ready to merge?

[sylvestre]

yeah, thanks