torture: Make hangs more visible in torture.sh output

This commit labels "QEMU killed" lines so that they will be picked up
by torture.sh processing.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>

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

@@ -49,7 +49,7 @@ do
 		then
 			if test -f "$i/qemu-retval" && test "`cat $i/qemu-retval`" -eq 137
 			then
-				echo QEMU killed
+				echo "Summary: Potential hang (QEMU killed)"
 			fi
 			configcheck.sh $i/.config $i/ConfigFragment > $i/ConfigFragment.diags 2>&1
 			if grep -q '^CONFIG_KCSAN=y$' $i/ConfigFragment.input

tools/testing/selftests/rcutorture/bin/parse-console.sh

@@ -113,7 +113,6 @@ then
 		then
 			print_warning $title `cat $T.seq`
 		fi
-		exit 2
 	fi
 fi | tee -a $file.diags