test: fix unit test runner.

src/t/test-common.cpp

@@ -19,6 +19,8 @@ int main(int argc, char **argv)
 {
     UNUSED(argc, argv);
 
-    return EXIT_SUCCESS;
+    lol::TextTestRunner runner;
+    bool success = runner.Run();
+    return success ? EXIT_SUCCESS : EXIT_FAILURE;
 }