tsan: allow to disable history collection
The mode is enabled with -DTSAN_NO_HISTORY=1 flag.
Intended mostly for research purposes (how fast can it go w/o history).



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@208878 91177308-0d34-0410-b5e6-96231b3b80d8