[TSan] remove artifacts from gotsan build in 'make clean' command

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174180 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: catch races on fd in more cases


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174184 91177308-0d34-0410-b5e6-96231b3b80d8
[Sanitizer] make internal_open have the same interface as libc version

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174187 91177308-0d34-0410-b5e6-96231b3b80d8