QRegularExpression: fix compiler warning in test

QTest::addRow expects a format specifier; this usage makes GCC complain
with -Wformat-security. Use the "old" newRow call instead.

Change-Id: Ieed8e4f64ff5e3d0d4e87325629d20ed6839ff9d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.cpp

@@ -2159,7 +2159,7 @@ void tst_QRegularExpression::wildcard_data()
     QTest::addColumn<int>("foundIndex");
 
     auto addRow = [](const char *pattern, const char *string, int foundIndex) {
-        QTest::addRow(pattern) << pattern << string << foundIndex;
+        QTest::newRow(pattern) << pattern << string << foundIndex;
     };
 
     addRow("*.html", "test.html", 0);