Run GDB for crashed named servers
When a core file was generated after named crashed during a system test on 9.16, it wasn't processed by GDB, and no backtrace report was created. This is now fixed. There are also a few white-space changes.
1603598 is an example of a job which created two core files (one per test) but none of them was processed by the GDB.
This problem does not affect main
not v9_11
.