Check possible wrong removal of QSKIPs in qtbase

commits to be checked (git log --grep --oneline "remove.*QSKIP" – tests/auto/)

• Q_OS_UNIX

  fdc9ce5 Test: remove QSKIP from tst_QSocketNotifier::posixSockets
  

• Q_OS_WIN

  f7f9a28 Test: remove QSKIP from tst_QDateTime::fromString_LOCALE_ILDATE
  18a3ebe Test: remove QSKIP in tst_QDirIterator::hiddenDirs_hiddenFiles
  782cae4 Test: remove QSKIP in tst_QCoreApplication::argc
  

• Q_OS_MAC

  4fc515d Test: remove QSKIP from tst_LargeFile::mapOffsetOverflow
  171c638 tst_QLabel: remove QSKIP, wrap Q_OS_MAC
  70bef12 tst_QMainWindow: remove QSKIP, wrap Q_OS_MAC
  

• Q_OS_WINCE

  8506850 Test: remove QSKIP from tst_QTextStream::stillOpenWhenAtEnd
  0b23cd1 Test: remove QSKIP in tst_QDataStream::stream_QIcon
  1fef528 Test: remove QSKIP in tst_QDir::dotAndDotDot
  c35c913 Test: remove QSKIP from tst_QThread::stressTest
  c8c0bdf Test: remove QSKIP in tst_QDataStream::stream_QPixmap
  d81cf44 Test: remove QSKIP from tst_qstextstream
  26dddab Test: remove QSKIP from tst_QProcessEnvironment::putenv
  41dc50e tst_QMenu: remove QSKIP's -> wrap Q_OS_WINCE
  

• other

  9c0544f Test: remove QSKIP in tst_QEventLoop::throwInExec()
  044f5b7 Test: remove QSKIP from tst_qstring
  f948294 Test: remove QSKIP from tst_QStringList::initializeList()
  33aea0c Test: remove QSKIP in tst_QLocale::emptyCtor
  5c57d1e Test: remove QSKIP in tst_qarraydata
  6dfeee6 Test: remove QSKIP in tst_file
  8a2d1ce Test: remove QSKIP and remove whole test cases instead.
  ceb5474 Test: remove QSKIP in tst_QDBusMarshall::receiveUnknownType
  c5ec39b Test: remove QSKIP from tst_qtconcurrent
  a530c33 Test: remove QSKIP in tst_QSharedPointer::lambdaCustomDeleter
  21b5c1d tst_qfile: remove QSKIP's -> omit whole test cases instead
  f92f780 tst_QMenuBar: remove QSKIP's -> omit whole test cases instead
  b4bf76f tst_QLocale: remove QSKIP, wrap Q_OS_MAC/Q_OS_WIN
  cecc2c6 Test: Redo remove QSKIP from printsupport tests
  5704cbc Test: remove QSKIP from printsupport tests
  

• ok

  aeb21c7 test: Mark tst_QMdiSubWindow failures as XFAIL
  f0b922a test: Mark tst_QTabBar::sizeHints() failure as XFAIL