torture: Add kvm.sh test summary to end of log file

This commit adds the test summary to the end of the log in the top-level
directory containing the kvm.sh test artifacts.  While in the area, it adds
the kvm.sh exit code to this test summary.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/testing/selftests/rcutorture/bin/kvm.sh

@@ -527,15 +527,18 @@ END {
 }' >> $T/script
 
 cat << '___EOF___' >> $T/script
-echo
-echo
-echo " --- `date` Test summary:"
+echo | tee -a $TORTURE_RESDIR/log
+echo | tee -a $TORTURE_RESDIR/log
+echo " --- `date` Test summary:" | tee -a $TORTURE_RESDIR/log
 ___EOF___
 cat << ___EOF___ >> $T/script
-echo Results directory: $resdir/$ds
-kcsan-collapse.sh $resdir/$ds
-kvm-recheck.sh $resdir/$ds
+echo Results directory: $resdir/$ds | tee -a $resdir/$ds/log
+kcsan-collapse.sh $resdir/$ds | tee -a $resdir/$ds/log
+kvm-recheck.sh $resdir/$ds > $T/kvm-recheck.sh.out 2>&1
 ___EOF___
+echo 'ret=$?' >> $T/script
+echo "cat $T/kvm-recheck.sh.out | tee -a $resdir/$ds/log" >> $T/script
+echo 'exit $ret' >> $T/script
 
 if test "$dryrun" = script
 then
@@ -556,9 +559,9 @@ then
 	exit 0
 else
 	# Not a dryrun, so run the script.
-	sh $T/script
+	bash $T/script
 	ret=$?
-	echo " --- Done at `date` (`get_starttime_duration $starttime`)"
+	echo " --- Done at `date` (`get_starttime_duration $starttime`) exitcode $ret" | tee -a $resdir/$ds/log
 	exit $ret
 fi