ignore generated files

[urandom2]

description

rice includes all files from requested FindBox directory, I noticed in #135 this can become problematic if generated files or binaries get accidentially included.

While #37/#83 or #47 could help with this, it feels pretty straight forward to at least exclude the rules from rice clean.

[GeertJohan]

This could work indeed. Would you be willing to create a PR for this?

[urandom2]

Happily, I think the low hanging fruit is the rice generated files, and that should not be too hard.

Detecting go binaries and ignoring go source could lead to false positives, so if you have any ideas let me know.