wrc_core sim for wrpc-v5 works

In wrpc-v5, LM32 is replaced by RISC-V. Hence, the new compiled WRPC software for the simulation is added (wrc.bram file). Also, the size of the RAM used by the WRPC software is increased. The testbench sets hdl_testbench structure used for communication with the software. The simulation now works both with Riviera-PRO and ModelSim. In Manifest.py, both ModelSim and Riviera are supported, but some lines should be commented out depending on the simulation tool used. To run the simulation with Riviera, run_riv.do should be used. To run the simulation with ModelSim, run.do should be used.