ITI's SimulationX specific "ModelicaExternalC.lib" (http://www.simulationx.com/)

This is needed to create the SimulationX specific DLL wrapper library "ITI_ModelicaDeviceDrivers.dll" (SimulationX built-in simulation requires a compiled DLL for external code).

The binary ModelicaExternalC.lib is public domain software (https://github.com/modelica/Modelica_DeviceDrivers/issues/14#issuecomment-40451741).
