Waveform demo for riscv-mini , rocket16 and VCD header comparison (module and signal)

[MSPDUTTA]

No description provided.

[sbeamer]

Thank you for making this! Can you revise the following:

1. Refactor the pull request into two pull requests? One for waveform-demo and one for waveform-test
2. Soft linkTestHarness.DefaultConfig.1609.fir instead of copying it.
3. Do not include libfesvr.so (a binary compiled for the host platform). I doubt it is needed in that exact location, and can probably change the paths in the Makefile to use the appropriate fesvr components from rocket16. If you do need it in that location, please use a soft link.

[MSPDUTTA]

I have sent a request only for the waveform-demo with all these suggested updates.

[sbeamer]

I did a clean pull and after some modification, go it to run!

Please fix the following so others can just do a clean pull:

1. For waveform-demo/rocket16, please fix the Makefile and such with regards to libfesvr.so. The easiest might be too soft link the riscv directory from rocket16.
2. Bump the essent submodule pointer to include the VCD/FST commits.
3. Softlink Tile.fir for riscv-mini.

[MSPDUTTA]

I have updated with these modifications!

[sbeamer]

Thank you!