Make compilator configurable so that we can compile source code on different platforms (ArmV7 or x86).

Allow to run OPC_Ua serer in a virtual mode without real read / writes over I2C to MOD-IOs. Usefull for pure testing on x86 platform where I2C support is missing or simple not needed.

Use usual location as open62541 copies generated by amalgation switch generated files to its source folder and libraries in its build folder.