Add additional requirements for compiling verilator using MinGW

[vincentbaeten]

Adding some additional requirements that are needed for compiling the latest version of verilator using MinGW on windows.

[Readon]

So what version does this modification target? How about modify the version too?

[vincentbaeten]

Maybe I phrased it a bit incorrect. I only tried compiling the latest verilator version which is v5.038 at the moment but I do not know if there requirements were already present for the mentioned version v4.032 in the docs. I assume these were already a requirement back then given that these are basic requirement but were already installed in the environment of whoever wrote this documentation.