Sometimes the ldconfig.service might take a bit longer to finish,
causing spurious test timeouts:
```
[ 1025.858923] systemd[24]: ldconfig.service: Executing: /sbin/ldconfig -X
...
[ 1043.883620] systemd[1]: ldconfig.service: Main process exited, code=exited, status=0/SUCCESS (success)
...
Trying to halt container. Send SIGTERM again to trigger immediate
termination.
Container TEST-52-HONORFIRSTSHUTDOWN terminated by signal KILL.
E: Test timed out after 20s
```
# Using timeout because if the test fails it can loop.
# The reason is because the poweroff executed by end.service
# could turn into a reboot if the test fails.
-NSPAWN_TIMEOUT=20
+NSPAWN_TIMEOUT=60
# Remove this file if it exists. This is used along with
# the make target "finish". Since concrete confirmation is