[libFuzzer] add -trace_malloc= flag

llvm-svn: 284149
diff --git a/llvm/lib/Fuzzer/FuzzerOptions.h b/llvm/lib/Fuzzer/FuzzerOptions.h
index ed31fa2..d0bac9c 100644
--- a/llvm/lib/Fuzzer/FuzzerOptions.h
+++ b/llvm/lib/Fuzzer/FuzzerOptions.h
@@ -51,6 +51,7 @@
   bool PrintCorpusStats = false;
   bool PrintCoverage = false;
   bool DetectLeaks = true;
+  int  TraceMalloc = 0;
 };
 
 }  // namespace fuzzer