[TSan] Use __sanitizer_pthread_attr_t in TSan

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177012 91177308-0d34-0410-b5e6-96231b3b80d8
[TSan] Add missing header inclusion

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177013 91177308-0d34-0410-b5e6-96231b3b80d8