scoped_vs_unscoped.unix_scoping starts a child process and a
grandchild process. Add the missing check for the grandchild's exit
status and propagate it upwards.
Signed-off-by: Günther Noack <redacted>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261104-selftests-refactor-v2-0-c52f23f7ce33@gmail.com?part=1