Fix and update docs for needs-force-clang-based-tests - #2085

Fix and update docs for needs-force-clang-based-tests#2085

jieyouxu merged 2 commits into

rust-lang:masterrust-lang/rustc-dev-guide:masterfrom

jieyouxu:needs-force-clang-based-testsjieyouxu/rustc-dev-guide:needs-force-clang-based-testsCopy head branch name to clipboard