[TSan] remove temporary build directory in 'make clean' command

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@176012 91177308-0d34-0410-b5e6-96231b3b80d8
[TSan] Add interceptor for malloc_usable_size()

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@176013 91177308-0d34-0410-b5e6-96231b3b80d8