Fix fd_fdstat_set_flags truncating with O_TRUNC
#8618
| Job | Run time |
|---|---|
| 2m 22s | |
| 4m 21s | |
| 3m 50s | |
| 3m 56s | |
| 4m 3s | |
| 5m 20s | |
| 2m 8s | |
| 2m 57s | |
| 3m 41s | |
| 2m 9s | |
| 4m 48s | |
| 2m 2s | |
| 5m 23s | |
| 4m 9s | |
| 2m 19s | |
| 53m 28s |