Eclipse JGit: Java implementation of Git 4.7.7

Fixes

• [Security fix] Fix that AdvertiseRefsHook was not called for git-upload-pack in protocol v0 stateless transports, meaning that in Gerrit using AdvertiseRefsHook for validation wants were not validated and a user could fetch anything that is pointed to by any ref (using fetch-by-sha1), as long as they could guess the object name.