Create a minimal example with partial derivatives

[chrbertsch]

moved from CATIA-Systems/Test-FMUs#14

One could e.g. use the LinearTransform example. There trivially the Jacobian is just the Matrix A; so one can easily provide dirictionalderivatives by multiplying with A.

And I would like to extend this for the adjoint derivatives modelica/fmi-standard#722.

[t-sommer]

One could e.g. use the LinearTransform example.

The VanDerPol model might be the better model to demonstrate this feature. It already implements getPartialDerivative().

[t-sommer]

Doesn't the jacobian.c example already demonstrate the use of partial derivatives?

[chrbertsch]

Doesn't the jacobian.c example already demonstrate the use of partial derivatives?

Yes it does