qt5declarative: fix examples compile without OpenGL support

qt5declarative: fix examples compile without OpenGL support

Add upstream patch to fix examples compile without OpenGL support, in
the Qt 5.9 version of qt5declarative.

Fixes [1]:

  In file included from fbitem.h:49:0,
                   from mainwindow.cpp:42:
  logo.h:52:11: error: 'GLfloat' does not name a type
       const GLfloat *constData() const { return m_data.constData(); }
             ^
  logo.h:57:15: error: 'GLfloat' has not been declared
       void quad(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2, GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4);
                 ^
  [...]
  Makefile:610: recipe for target '.obj/mainwindow.o' failed
  make[5]: *** [.obj/mainwindow.o] Error 1
  make[5]: Leaving directory '.../build/qt5declarative-5.9.2/examples/quick/quickwidgets/qquickviewcomparison'
  Makefile:70: recipe for target 'sub-qquickviewcomparison-make_first' failed
  make[4]: *** [sub-qquickviewcomparison-make_first] Error 2
  make[4]: *** Waiting for unfinished jobs....

[1] http://autobuild.buildroot.net/results/cef4abbe043f3aaad03c73e07cfab9d24c3d0fc9

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>