iotests: check: return 1 on failure

We should indicate failure by exit code, not only output.

Reported-by: Peter Maydell
Fixes: f203080bbd9f9e5b31041b1f2afcd6040c5aaec5
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210201085041.3079-1-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 5190dee..d1c87ce 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -140,4 +140,7 @@
     else:
         with TestRunner(env, makecheck=args.makecheck,
                         color=args.color) as tr:
-            tr.run_tests([os.path.join(env.source_iotests, t) for t in tests])
+            paths = [os.path.join(env.source_iotests, t) for t in tests]
+            ok = tr.run_tests(paths)
+            if not ok:
+                sys.exit(1)