[asan] Add option to enable asan-use-after-scope from clang.

Clang will have -fsanitize-address-use-after-scope flag.

PR27453

Reviewers: kcc, eugenis, aizatsky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D20750

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271067 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed