We support up to clang-11 which includes some additional checks. It's better to catch these during the Kokoro/quick tests than during the nightly compilation tests. Change-Id: I8076f296875448d39416fecc947f71230ce2ddf7 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56003 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>