Parsing new packge.license file

[TheChymera]

We are now supporting the new package.license file: e34b34f

But we do not parse it in the ID generation. This is because I couldn't figure out what class to use for it. Additionally, #gentoo-portage indicates we might not want to use these classes to begin with:

zmedico | chymera: that PackageKeywordsFile class is actually not used. We actually use a function called grabdict_package for files like these: https://gitweb.gentoo.org/proj/portage.git/tree/lib/portage/package/ebuild/_config/LicenseManager.py?h=portage-2.3.99#n36