perf test: Fix test case perf evlist tests for s390x

Perf test case 78: perf evlist tests fails on s390.

The failure is causes by grouping events cycles and instructions because
sampling does only support event cycles.  Change the group to software
events to fix this.

Output before:
  # ./perf test 78
  78: perf evlist tests              : FAILED!
  #

Output after:
  # ./perf test 78
  78: perf evlist tests              : Ok
  #

Fixes: db452961de ("perf tests evlist: Add basic evlist test")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Ian Rogers <irogers@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Jan Polensky <japo@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/evlist.sh

@@ -38,13 +38,14 @@ test_evlist_simple() {
 
 test_evlist_group() {
 	echo "Group evlist test"
-	if ! perf record -e "{cycles,instructions}" -o "${perfdata}" true 2> /dev/null
+	if ! perf record -e "{cpu-clock,task-clock}" -o "${perfdata}" \
+		-- perf test -w noploop 2> /dev/null
 	then
 		echo "Group evlist [Skipped event group recording failed]"
 		return
 	fi
 
-	if ! perf evlist -i "${perfdata}" -g | grep -q "{.*cycles.*,.*instructions.*}"
+	if ! perf evlist -i "${perfdata}" -g | grep -q "{.*cpu-clock.*,.*task-clock.*}"
 	then
 		echo "Group evlist [Failed to list event group]"
 		err=1