Add 'contrib/wireguard-tools/' from commit '7e00bf8773b93a2a3ee28dba2710d2ae443989f1'

git-subtree-dir: contrib/wireguard-tools
git-subtree-mainline: 9142a2a37b2fe65d46ace08a098ad26b8ff81541
git-subtree-split: 7e00bf8773b93a2a3ee28dba2710d2ae443989f1
(cherry picked from commit adf376485712c8fffbf3be330d505a969647f479)