cksum: Fix GNU test cksum-c.sh after bump to 9.9
#27951
| Job | Run time |
|---|---|
| 2m 50s | |
| 1m 50s | |
| 15s | |
| 6m 59s | |
| 26s | |
| 2m 15s | |
| 1m 9s | |
| 1m 56s | |
| 4m 17s | |
| 2m 14s | |
| 2m 0s | |
| 24m 43s | |
| 3m 19s | |
| 5m 32s | |
| 2m 36s | |
| 5m 48s | |
| 2m 24s | |
| 11m 44s | |
| 4m 29s | |
| 1m 58s | |
| 4m 16s | |
| 5m 20s | |
| 35s | |
| 1m 49s | |
| 1m 0s | |
| 5m 38s | |
| 5m 11s | |
| 6m 52s | |
| 4m 25s | |
| 9m 25s | |
| 7m 30s | |
| 7m 42s | |
| 4m 5s | |
| 7m 34s | |
| 8m 37s | |
| 10m 1s | |
| 12m 55s | |
| 13m 6s | |
| 7m 19s | |
| 13m 52s | |
| 4m 43s | |
| 7m 5s | |
| 4m 59s | |
| 53s | |
| 4h 3m 36s |