[llvm-dev] Stale links (buildbot, llvm-cov) on https://llvm.org

[Fāng-ruì Sòng via llvm-dev]

Buildbot (http://lab.llvm.org:8011/) -> it is now
https://lab.llvm.org/buildbot/ (currently 502 Bad Gateway)
llvm-cov (http://lab.llvm.org:8080/coverage/coverage-reports/index.html)
-> ERR_CONNECTION_REFUSED