[libFuzzer] don't disable msan for TracePC::CollectFeatures: this started to cause false positives in msan. No tests for libFuzzer+msan yet -- tests will need to wait until we move libFuzzer to compiler-rt 

git-svn-id: svn://svn.chromium.org/llvm-project/llvm/trunk/lib/Fuzzer@309038 0b72dbe1-c17f-4bc7-b9db-2b4152be0356
diff --git a/FuzzerTracePC.h b/FuzzerTracePC.h
index 26e1d09..fac2b2b 100644
--- a/FuzzerTracePC.h
+++ b/FuzzerTracePC.h
@@ -182,7 +182,7 @@
 }
 
 template <class Callback>  // bool Callback(size_t Feature)
-ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_NO_SANITIZE_ADDRESS
 __attribute__((noinline))
 void TracePC::CollectFeatures(Callback HandleFeature) const {
   uint8_t *Counters = this->Counters();