bug using verilator, make the whitespace consistend in Makefrag-verilator, explicitly name the verilog sources to match vsim, and update verisim/Makefile to use the new source variable names
bug using verilator, make the whitespace consistend in Makefrag-verilator, explicitly name the verilog sources to match vsim, and update verisim/Makefile to use the new source variable names