QNX: Skip failing test

Seems to be bug in QNX itself

Task-number: QTBUG-98561
Pick-to: 6.2
Change-Id: I525bd269b674e9e2b8c994bf778ab14b727df33f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

tests/auto/corelib/io/qdir/tst_qdir.cpp

@@ -451,6 +451,9 @@ void tst_QDir::mkdirOnSymlink()
 
     path = "two/four/five";
     fi.setFile(path);
+#if defined(Q_OS_QNX)
+    QSKIP("Fails on QNX QTBUG-98561");
+#endif
     QVERIFY2(fi.exists() && fi.isDir(), msgDoesNotExist(path).constData());
 #endif
 }