Make "nmake check" pass for gui tests in Windows.

Make "nmake check" pass for gui tests in Windows.

Marked the following tests insignificant due to failures, these need
to be fixed later and then re-enabled:

  tst_QPixmap
  tst_QClipboard
  tst_QWindow
  tst_QGuiApplication
  tst_QPainter
  tst_QPrinterInfo
  tst_QPrinter
  tst_QOpenGL
  tst_QFontDatabse
  tst_QFontMetrics
  tst_QGlyphRun
  tst_QRawFont

Task-number: QTBUG-24128
Change-Id: I39ade8a693c4580b5cd618624e892cdcac21d78c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>