[sanitizer] readdir and readdir_r interceptors.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@184950 91177308-0d34-0410-b5e6-96231b3b80d8
[tsan] Move some suppressions-related code to common.

Factor out code to be reused in LSan. Also switch from linked list to vector.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@184957 91177308-0d34-0410-b5e6-96231b3b80d8