Use gnu tar format for the bug reports
#6408
| Job | Run time |
|---|---|
| 1m 21s | |
| 1m 28s | |
| 1m 19s | |
| 1m 22s | |
| 1s | |
| 16m 58s | |
| 4m 59s | |
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| 5m 57s | |
| 1m 32s | |
| 25m 26s | |
| 17m 24s | |
| 17m 28s | |
| 4m 17s | |
| 3m 15s | |
| 17m 6s | |
| 2h 0m 35s |