[sanitizer] Intercept tcgetattr.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185626 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Close stderr before launching atos in asan_symbolize.py


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185631 91177308-0d34-0410-b5e6-96231b3b80d8