Revise compiler and packer patterns in cpdetect

`cpdetect` patterns for compilers & packers haven't been updated in a long time. It would make sense to go through them and revise them, throwing out very generic ones, adding new ones for new compilers & packers that were released in the meantime.

Start by locating the cpdetect compiler and packer pattern definitions and reviewing how their matches are tested. Compare the existing patterns with current compiler and packer releases, remove overly generic entries, and add relevant newer patterns; done means the pattern set is updated without introducing false-positive matches.

Written by the indexing model from the issue text.