[TSan] remove -fPIE -pie from TSan lit tests to check that -fsanitize=thread implies them now

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179365 91177308-0d34-0410-b5e6-96231b3b80d8
[MSan] don't build tests with -fPIE/-pie, as these flags are implied by -fsanitize=memory now

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179366 91177308-0d34-0410-b5e6-96231b3b80d8
[MSan] Demangle function name in description of stack origin

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179368 91177308-0d34-0410-b5e6-96231b3b80d8