Instead of splitting remove / exclusion of unwanted files in 2-3 places
(`all` rule, `update` rule, and update script in some cases), install
the same files in debug & release builds, and exclude unwanted stuff
when generating the update.
This should finally fix the CI issue with OCR tests (since we don't
remove the `data/dict` & `data/tessdata` directories on release build
anymore).
- forward unknown make targets to base
- add `cmake` and `staging` directories to ignored output artifacts
- drop `package.path` and `package.cpath` luarocks specific entries
