[compiler-rt] [asan] Add experimental 'track_poison' flag (PR #133175)

[Thurston Dang via llvm-commits]

================
@@ -116,6 +116,9 @@ ASAN_FLAG(bool, poison_partial, true,
           "stack buffers.")
 ASAN_FLAG(bool, poison_array_cookie, true,
           "Poison (or not) the array cookie after operator new[].")
+ASAN_FLAG(int, track_poison, 0,
----------------
thurstond wrote:

Renamed and updated description

https://github.com/llvm/llvm-project/pull/133175