Enable pipefail for TSan tests

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187875 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Intercept sched_getaffinity.

Re-applying with a more reliable test case.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187876 91177308-0d34-0410-b5e6-96231b3b80d8
Enable pipefail for ASan tests

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187877 91177308-0d34-0410-b5e6-96231b3b80d8
Distinguish 32-bit ASan from 64-bit ASan in lit configs

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187878 91177308-0d34-0410-b5e6-96231b3b80d8