adjusted gtkwave config files for UART experiments

cMIPS/v_irx.sav

cMIPS/v_rx.sav

cMIPS/v_tx.sav

cMIPS/vhdl/altera.vhd

cMIPS/vhdl/core.vhd

cMIPS/vhdl/packageExcp.vhd

cMIPS/vhdl/packageMemory.vhd

cMIPS/vhdl/tb_cMIPS.vhd