Merge branch 'jb43679' into 'mer-5.6'

[eglfs] Fix rendering issues when the screen is scaled. Fixes JB#43679

See merge request mer-core/qtbase!38

src/plugins/platforms/eglfs/qeglfscontext.cpp

@@ -339,6 +339,7 @@ QOpenGLFramebufferObject *QEglFSContext::fbo(QPlatformSurface *surface) const
     if (!m_fbo || m_fbo->size() != size) {
         delete m_fbo;
         m_fbo = new QOpenGLFramebufferObject(size);
+        m_fbo->setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
     }
     return m_fbo;
 }