wing guide curve points x-direction does not respect wing transformation

[merakulix]

As a consequence the x and z coordinates of wing guide curve points are wrong if the wing coordinate system is rotated.

In the following line, the global x-direction is used:

tigl/src/wing/CTiglWingSegmentGuidecurveBuilder.cpp

Line 102 in bd9dca3

gp_Dir rxDir = gp_Dir(1., 0., 0.);

Here we should apply the wing transformation.

To reproduce: Open simple_test_guide_curves.xml and rotate the wing. This changes the shape of the wing:

Before rotation of the wing:

After rotation of the wing: