Clarify doubts about licensing.

Hi! The "mega-cmd" package is under review for possible inclusion in the official Debian repositories. However, the copyright team found a problem in one of the files: > In particular sdk/cmake/vcpkg_overlay_ports/pdfium/vcpkg.json seems to be Apache 2, > which if combined with GPL version prior to GPL3 would be a GPL violation. And the > use of the GPL licenses here doesn't suggest that they have the text about choosing > a later version. I made a repack, leaving out the file for now. But could you clarify? thanks in advance!