Merge: perf sched timehist: decode process names of processes in zombie state

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1333

# Merge Request Required Information

JIRA: https://issues.redhat.com/browse/RHEL-68347

## Summary of Changes

Currently, process recorded in the zombie state are not decoded properly and only appear with their PID. This patch adds extra processing to decode the process name.

Signed-off-by: Anubhav Shelat <ashelat@redhat.com>

Approved-by: Michael Petlan <mpetlan@redhat.com>
Approved-by: jbrnak <jbrnak@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Scott Weaver <scweaver@redhat.com>

Author: swvrrh

tools/perf/builtin-sched.c

@@ -2174,6 +2174,11 @@ static void timehist_print_sample(struct perf_sched *sched,
 		printf(" ");
 	}
 
+	if (!thread__comm_set(thread)) {
+                const char *prev_comm = evsel__strval(evsel, sample, "prev_comm");
+                thread__set_comm(thread, prev_comm, sample->time);
+        }
+
 	printf(" %-*s ", comm_width, timehist_get_commstr(thread));
 
 	if (sched->show_prio)