Summary: Scoped capabilities need to be annotated as such, otherwise the thread safety analysis won't work as intended. Fixes PR39234. Reviewers: ldionne Reviewed By: ldionne Subscribers: christof, libcxx-commits Differential Revision: https://reviews.llvm.org/D53049 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@344096 91177308-0d34-0410-b5e6-96231b3b80d8