update to Qt 5.15

ground/gcs/src/libs/qwt/src/qwt_compass_rose.cpp

@@ -11,6 +11,7 @@
 #include "qwt_point_polar.h"
 #include "qwt_painter.h"
 #include <qpainter.h>
+#include <qpainterpath.h>
 
 static QPointF qwtIntersection( 
     QPointF p11, QPointF p12, QPointF p21, QPointF p22 )

ground/gcs/src/libs/qwt/src/qwt_dial_needle.cpp

@@ -13,6 +13,7 @@
 #include "qwt_painter.h"
 #include <qapplication.h>
 #include <qpainter.h>
+#include <qpainterpath.h>
 
 #if QT_VERSION < 0x040601
 #define qFastSin(x) qSin(x)

ground/gcs/src/libs/qwt/src/qwt_null_paintdevice.cpp

@@ -10,6 +10,7 @@
 #include "qwt_null_paintdevice.h"
 #include <qpaintengine.h>
 #include <qpixmap.h>
+#include <qpainterpath.h>
 
 class QwtNullPaintDevice::PrivateData
 {

ground/gcs/src/libs/qwt/src/qwt_painter.cpp

@@ -27,6 +27,7 @@
 #include <qpaintengine.h>
 #include <qapplication.h>
 #include <qdesktopwidget.h>
+#include <qpainterpath.h>
 
 #if QT_VERSION >= 0x050000
 #include <qwindow.h>

ground/gcs/src/libs/qwt/src/qwt_painter_command.h

@@ -15,8 +15,7 @@
 #include <qpixmap.h>
 #include <qimage.h>
 #include <qpolygon.h>
-
-class QPainterPath;
+#include <qpainterpath.h>
 
 /*!
   QwtPainterCommand represents the attributes of a paint operation

ground/gcs/src/libs/qwt/src/qwt_plot_panner.cpp

@@ -14,6 +14,7 @@
 #include <qbitmap.h>
 #include <qstyle.h>
 #include <qstyleoption.h>
+#include <qpainterpath.h>
 
 static QBitmap qwtBorderMask( const QWidget *canvas, const QSize &size )
 {

ground/gcs/src/libs/qwt/src/qwt_plot_renderer.cpp

@@ -27,6 +27,7 @@
 #include <qstyle.h>
 #include <qstyleoption.h>
 #include <qimagewriter.h>
+#include <qpainterpath.h>
 #ifndef QWT_NO_SVG
 #ifdef QT_SVG_LIB
 #include <qsvggenerator.h>

ground/gcs/src/libs/qwt/src/qwt_widget_overlay.cpp

@@ -13,6 +13,7 @@
 #include <qpaintengine.h>
 #include <qimage.h>
 #include <qevent.h>
+#include <qpainterpath.h>
 
 static QImage::Format qwtMaskImageFormat()
 {