Filelist including generated and external modules

[jpienaar]

The split export verilog pass creates a filelist of the files it generates. I also have external modules that have been created before and I'd like to create a self contained file list of all the files (generated or external). I'm considering just creating an additional list in export verilog and keying off an attribute of HWModuleExtern. Is there a different way that would be preferred? (I mean, I could just create separate filelists that I then concatenate post/outside pipeline, but just generating it given all data is available right from start feels nicer)