[tsan] minor enhancements in the new tsan allocator and a test malloc replacement library that can be linked to any program to replace malloc (tested on spec2006)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@160436 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed