[VPN 2.0] BoringTun 3p dependency: license information.
This is a multi-part change to add BoringTun dependency to the brave-core, to be used later in the VPN 2.0 architecture by a privileged helper on desktop OSes. The dependency is added to the existing VPN to ensure it actually gets built with the browser, but not yet distributed.
Part 3: license information for Boringtun and its dependencies needed by Brave build system. Created a custom script to generate the necessary licensing information (README.chromium, and combined license files where appropriate) and put that information directly into the "brave/third-party/vendor" directory. The script should be re-run on updating the vendored crates.
Alex
189e5dcd17